Texas Instruments Titanium TI-89 Instrucciones de montaje

TI-89 / TI-92 Plus Tip List 10.0

Compiled by Doug Burkett, [email protected]

Created 12 aug 99, revised 20 July 2002

Dedicated to my wife,

Janet Katherine Scholz Burkett,

who cheerfully tolerates all this silliness...

Important!

Neither I, Doug Burkett, nor any of the contributors to this tip list are responsible in any way

for any damage of any kind that you or anyone else may incur from using the information in

this tip list. These tips are provided for educational purposes only. The contributors and I

believe that all information is accurate and reliable, but we make no expressed or implied

warrantee or guarantee to that effect. Some tips may involve hardware or software

modifications to the calculator that may void the manufacturer's warrantee.

This document is a collection of useful tips and hints relating to the TI-89 and TI-92 Plus calculators.

The tips come from user experience and many other sources, and apply to all facets of calculator

operation and programming. The tip list has grown to include reference material, humor and oddities,

so perhaps the name Tip List, is no longer appropriate, but it stands for now.

The tip list is not a buglist, a wishlist or a FAQ. I maintain a wishlist, and good FAQs are available.

While a FAQ is, by definition, frequently asked questions, this list instead describes useful techniques

which may be 'infrequently asked'. These are sophisticated calculators and some features are not

obvious. All users have different skills, and what is obvious to some is not obvious to all.

I want the tip list to be the ultimate, exhaustive source of TI-89 / TI-92+ operation. If you find a good tip

or clever solution, please email me. In general I give credit to the first person to submit a particular tip.

Let me know if your tip is from a manual, or you really learned it from someone else. If a tip gives no

credit, that only means I came up with it on my own, not that I am the original inventor.

Bhuvanesh Bhatt has generously volunteered to keep this list on his site:

http://triton.towson.edu/~bbhatt1/ti/

Thanks Bhuvanesh! Bhuvanesh also maintains a bug list for these calculators.

Through the gracious efforts of Andrew Cacovean, the tip list is also available here:

http://www.angelfire.com/realm/ti_tiplist/

Andrew developed and maintains this site. You can download the entire tip list or individual tips, tip list

code and also the wishlist. Andrew has also written some very good examples of operation.

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Some tips include code listings, which can be typed in. Most of the code is included in a zip file called

tlcode.zip. I use lots of comments and white space in these listings, so you will save considerable RAM

or archive memory by deleting these comments. Beginning with version 9.0, the code listings shown in

the tips are not the same as those in the tlcode.zip file. The code shown in the tips contains

explanatory comments. Those comments are not actually included in the tlcode.zip versions, to reduce

RAM/flash requirements. Code from earlier tip list versions may still have all the comments included.

The tips are organized in these sections:

[1] Miscellaneous: Tips that do not fit in any other category, as well as humor and hardware

[2] Computer Algebra System (CAS): Using the CAS for symbolic algebra

[3] Data structures: Working with matrices, lists and data variables

[4] Graphing and plotting: Function graphing, data plotting, operations on the graph screen

[5] Graph-Link Cable and Software: Using the TI GraphLink cables and software

[6] Math: Mostly numerical mathematics

[7] TI Basic programming: Programming techniques, tricks and work-arounds

[8] String variables: Manipulating string variables

[9] User interface: User input and output, dialog boxes and results formatting.

[10] Units Conversions: Using the built-in units conversions

[11] Solving: Using the various solving functions, including solve(), nsolve() and csolve()

[12] C Programming: A few tips on writing and using C and ASM programs

There are also a few appendices of reference material:

[A] Anti-tips - things that can't be done: Summary of calculator and CAS limitations

[B] More resources: Includes FAQs, TI documentation and useful web sites

[C] Glossary: of common and obscure terms

[D] Quick reference guide: to calculator commands and functions

[E] Tip list programs and functions: Alphabetic list of all routines in tlcode.zip

Note that the table of contents includes active links to all the tips.

I hope you find this useful or interesting, and that you will consider contributing your ideas and

corrections to this list.

Doug Burkett

Eaton, OH USA

[email protected]

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Contents
2-16[2.24] Infinity^0 evaluates to 1 ....................................................... 2-15[2.23] Try comDenom() for faster partial factoring ........................................ 2-13[2.22] Methods for some CAS functions ................................................ 2-12[2.21] Differentiation and integration fail with part() ....................................... 2-12[2.20] factor() with respect to list elements .............................................. 2-11[2.19] Restrict function arguments to integers ........................................... 2-10[2.18] Delay evaluation to simplify expressions .......................................... 2-10[2.17] Use a 'clean' or empty folder for CAS operations .................................... 2-9[2.16] Find partial fractions with expand() ............................................... 2-9[2.15] Use change of variable in limits of when() functions ................................. 2-8[2.14] Define functions that CAS can manipulate ......................................... 2-8[2.13] Try comDenom() to find limits ................................................... 2-7[2.12] Testing equivalence of symbolic expressions ...................................... 2-6[2.11] Force getnum() and getdenom() to return correct results with part() ..................... 2-5[2.10] CAS square root simplification limitations ......................................... 2-4[2.9] Find more symbolic integrals, faster, with Real mode and constraints ..................... 2-4[2.8] Use expand() with respect to variable for faster results ................................ 2-4[2.7] Use when() in integration in AMS 2.03 ............................................. 2-3[2.6] CAS uses common convention for integral of x^n .................................... 2-3[2.5] Try manual simplification to improve symbolic integration .............................. 2-3[2.4] Use Exact mode to ensure Limit() success ......................................... 2-2[2.3] Use when() for absolute values in integrals ......................................... 2-1[2.2] Try constraints or solve() in symbolic equality tests ................................... 2-1[2.1] Force complete simplification with repeated evaluation ................................
2.0 Computer Algebra System (CAS) tips
1-51[1.23] Ray Kremer interview on TI Student Features page .................................. 1-49[1.22] TI Calc-Con '02 trip reports ..................................................... 1-45[1.21] TI-89 Internal photographs ..................................................... 1-40[1.20] TI-92 Plus internal photographs ................................................. 1-38[1.19] Kraftwerk's Pocket Calculator song .............................................. 1-29[1.18] Myth and legend from the TI discussion groups ..................................... 1-28[1.17] Quick tips .................................................................. 1-20[1.16] Use your TI-89 / TI-92 Plus as an on-screen ruler and protractor ....................... 1-19[1.15] Permission to copy TI guidebooks ............................................... 1-17[1.14] Cleaning a calculator after spills and other accidents ................................ 1-17[1.13] Developer's guide describes calculator internal operation ............................. 1-16[1.12] Processor clock speed and battery voltage ........................................ 1-16[1.11] "Low Battery" indication voltages ................................................ 1-12[1.10] Patents for TI-89 and TI-92+ ................................................... 1-10[1.9] Physical characteristics of TI-89 and TI-92 Plus ..................................... 1-10[1.8] Make a protective plastic 'skin' for your calculator .................................... 1-9[1.7] Undocumented error codes ..................................................... 1-9[1.6] Manual error for SetMode() codes for Angle modes ................................... 1-7[1.5] Creating picture variables on a PC ................................................ 1-3[1.4] Importing and exporting PC data with the TI-89 / TI-92 Plus ............................ 1-2[1.3] Alphabetic list of reserved variable names .......................................... 1-2[1.2] TI92+ manual error for Logistic regression equation .................................. 1-1[1.1] Discussion Group etiquette .....................................................
1.0 Miscellaneous tips
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Revision record: 9.0 to 10.0 .......................................................
0-9
Contributors ....................................................................
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5-2[5.4] Try Var-Link to fix GraphLink transmission errors .................................... 5-1[5.3] Do not restore a HW1 backup to a HW2 calculator ................................... 5-1[5.2] Backing up and restoring individual variables may be safer that Get Backup ............... 5-1[5.1] Unarchive variables to fix GraphLink transmission errors ..............................
5.0 GraphLink Cable and Software Tips
4-22[4.15] Delete statistics plots from programs ............................................. 4-22[4.14] Completely clear Graph screen ................................................. 4-18[4.13] Bode plots .................................................................. 4-16[4.12] Random scatter plots of 'noisy' functions .......................................... 4-15[4.11] 3D data plots ............................................................... 4-9[4.10] Faster plots of integral functions ................................................. 4-8[4.9] Faster plots of slow functions .................................................... 4-7[4.8] Plot functions that return lists .................................................... 4-7[4.7] Graphing piece-wise defined function with a unit step function .......................... 4-6[4.6] Graphing piece-wise defined functions with "|" operator ............................... 4-6[4.5] 3D parametric line and surface plots .............................................. 4-4[4.4] Plot data and functions simultaneously ............................................ 4-2[4.3] Truth plots ................................................................... 4-2[4.2] Use DispG to force update to „x and „y ........................................... 4-1[4.1] Plot "vertical" lines on graph screen ...............................................
4.0 Graphing and plotting tips
3-38[3.31] Store new list element at index greater than dimension ............................... 3-36[3.30] Singular value decomposition (SVD) of a matrix .................................... 3-35[3.29] Convert data variables to matrices ............................................... 3-35[3.28] Fill a list or matrix with a constant ................................................ 3-34[3.27] Fast symbolic determinants .................................................... 3-29[3.26] Find indices of specific elements in lists and matrices ................................ 3-28[3.25] Internal error with seq() and Boolean operators in list index calculation .................. 3-27[3.24] Use equations to build lists of lists and matrices .................................... 3-21[3.23] Use single bits as flags to save status information ................................... 3-21[3.22] Create lists with logarithmic element spacing ....................................... 3-20[3.21] Convert matrices to single-row or single-column vectors .............................. 3-19[3.20] Find matrix minimum and maximum .............................................. 3-19[3.19] Test a list for identical elements ................................................. 3-18[3.18] Swap list elements ........................................................... 3-18[3.17] Conditional tests on lists ....................................................... 3-10[3.16] Use arrays with more than 2 dimensions .......................................... 3-10[3.15] Turn Pretty Print off to display commas in lists, matrices .............................. 3-9[3.14] Randomize list elements ...................................................... 3-7[3.13] Find matrix minor and adjoint ................................................... 3-7[3.12] Don't use „list function in data editor .......................................... 3-6[3.11] Store anything in a matrix ...................................................... 3-6[3.10] Appending is faster than augment() for adding elements to lists; seq() is even faster ........ 3-5[3.9] Replace matrix rows and columns ................................................ 3-4[3.8] Work-around for writing to data variable elements .................................... 3-4[3.7] Replacement for Fill instruction in functions ......................................... 3-3[3.6] Convert True/False list to 0's and 1's .............................................. 3-2[3.5] Unexpected NewMat() operation in Cylindrical and Spherical vector modes ................ 3-2[3.4] Reverse list elements .......................................................... 3-2[3.3] Delete matrix rows and columns .................................................. 3-1[3.2] Calculate table indices instead of searching ........................................ 3-1[3.1] Using indirection and setFold() with matrix elements ..................................
3.0 Data structure tips
2-18[2.26] limit() fails with piecewise functions .............................................. 2-18[2.25] Factor on complex i to show polynomial complex coefficients ..........................
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6-82[6.49] Taylor() polynomial function finds tangent line ...................................... 6-81[6.48] Use R>Pθfor four-quadrant arc tangent function .................................... 6-81[6.47] Unsigned infinity displays as undef .............................................. 6-79[6.46] solve() and nsolve() ignore constraints with local variables ............................ 6-78[6.45] Determine if a point is inside a triangle ............................................ 6-78[6.44] Nest min() in max() to limit an argument ........................................... 6-77[6.43] Dot product (scalar product) for complex vectors .................................... 6-75[6.42] stdDev() and variance() find sample (not population) statistics ......................... 6-73[6.41] Integration error in AMS 2.05 ................................................... 6-72[6.40] Write functions with multiple input argument types .................................. 6-71[6.39] Convert equations to a parameterized form ........................................ 6-71[6.38] Finance Flash Application function finds days between two dates ....................... 6-71[6.37] Random number generator algorithm ............................................. 6-70[6.36] Integration may return 'undef' for identical integration limits ............................ 6-66[6.35] Cumulative normal distribution and inverse ........................................ 6-64[6.34] Error function for real arguments ................................................ 6-61[6.33] Sine and cosine integrals ...................................................... 6-60[6.32] Accurate approximate solutions to quadratic equations with large coefficients ............. 6-57[6.31] Fast 2nd-order interpolation with QuadReg ........................................ 6-56[6.30] Spherical coordinate conventions ................................................ 6-55[6.29] Dirac's delta (impulse) and Heaviside (step) functions ................................ 6-44[6.28] Bilinear interpolation .......................................................... 6-39[6.27] Find Bernoulli numbers and polynomials .......................................... 6-27[6.26] Accurate numerical derivatives with nDeriv() and Ridder's method ...................... 6-26[6.25] Polar and rectangular coordinate conversions ...................................... 6-26[6.24] Fast Fibonacci Numbers ....................................................... 6-25[6.23] Step-by-step programs ........................................................ 6-24[6.22] Linear Interpolation ........................................................... 6-24[6.21] Evaluating polynomials ........................................................ 6-23[6.20] Generating random numbers ................................................... 6-22[6.19] Sub-divide integration range to improve accuracy ................................... 6-22[6.18] Use iPart() and int() effectively .................................................. 6-21[6.17] Use dd.mmssss format to convert angles faster ..................................... 6-20[6.16] Transpose operator and dot product find adjoint and complex scalar product .............. 6-19[6.15] Convert equations between rectangular and polar coordinates ......................... 6-19[6.14] Use norm() to find root mean square (RMS) statistic for matrices ....................... 6-17[6.13] Find coefficients of determination for all regression equations .......................... 6-14[6.12] Find faster numerical solutions for polynomials ..................................... 6-14[6.11] Rounding floating point numbers ................................................ 6-9[6.10] Exact solutions to cubic and quartic equations ...................................... 6-9[6.9] Convert floating-point numbers to exact fractions .................................... 6-8[6.8] Convert trigonometric expressions to exponential format .............................. 6-7[6.7] Complex derivatives ........................................................... 6-6[6.6] Linear regression through a fixed point ............................................ 6-5[6.5] Round numbers to significant digits ............................................... 6-3[6.4] Gamma and log-gamma functions ................................................ 6-2[6.3] Improving floating-point solutions to simultaneous equations ........................... 6-1[6.2] Use rectangular complex mode for faster results ..................................... 6-1[6.1] Simulate poly function of TI-85/86 ................................................
6.0 Math Tips
5-16[5.11] Improve font size of printed program source code ................................... 5-16[5.10] Run GraphLink under Windows XP .............................................. 5-15[5.9] GraphLink software sends either TI-89 or TI-92 Plus files .............................. 5-13[5.8] Opening variables in GraphLink changes some characters ............................. 5-13[5.7] GraphLink switchbox aids CBR/CBL programming ................................... 5-2[5.6] Build your own GraphLink cable (Hess's BCC Serial Link) ............................. 5-2[5.5] Use TalkTI to develop PC applications which communicate with the TI-89 / TI-92 Plus .......
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7-41[7.41] Indirection bug with local variables ............................................... 7-40[7.40] Recall expression without variable value substitution ................................ 7-39[7.39] Quickly delete locked, archived variables .......................................... 7-37[7.38] Why use TI Basic? ........................................................... 7-36[7.37] Simulate SWITCH or CASE statement with GOTO and indirection ...................... 7-35[7.36] Input arguments for 'keyboard' programs .......................................... 7-35[7.35] Conditonal test in If ...EndIf evaluates all 'and' arguments ............................. 7-34[7.34] Use linefeed char(10) for separate lines in program Help ............................. 7-33[7.33] Local functions must be declared as local variables ................................. 7-30[7.32] Documenting programs ....................................................... 7-29[7.31] return shows variables during debugging .......................................... 7-29[7.30] sign() function is not compatible with other programming languages ..................... 7-28[7.29] Table of getConfg() list elements ................................................ 7-26[7.28] Use long strings with setMode() in custom menus .................................. 7-25[7.27] getMode() returns strings in capital letters ......................................... 7-25[7.26] dim() functions slow down with lists and matrices with large elements ................... 7-24[7.25] Use scripts to test program and functions ......................................... 7-23[7.24] Use a script for self-deleting set-up programs ...................................... 7-21[7.23] Passing user function names as program/function arguments .......................... 7-21[7.22] Local documentation for functions and programs .................................... 7-21[7.21] Use undef as an argument ..................................................... 7-20[7.20] Running programs within a program .............................................. 7-20[7.19] Bypass programs locked with ans(1) and 4→errornum:passerr ......................... 7-18[7.18] Simplest (?) application launcher ................................................ 7-17[7.17] Returning more than one result from a function ..................................... 7-16[7.16] Use when() instead of if...then...else...endif ........................................ 7-16[7.15] Avoid For ... EndFor loops ..................................................... 7-14[7.14] Determine calculator model and ROM version in programs ............................ 7-13[7.13] Write to program & function arguments ........................................... 7-12[7.12] Access a variable from any folder with "_" (underscore) .............................. 7-11[7.11] Run TI Basic programs before archiving for better execution speed ..................... 7-11[7.10] Calling built-in applications from your programs ..................................... 7-10[7.9] Passing optional parameters to functions and programs ............................... 7-8[7.8] Return program results to home screen ............................................ 7-6[7.7] Use return instead of stop in programs for better flexibility, and to avoid a crash ............ 7-6[7.6] Recursion limits .............................................................. 7-5[7.5] Considerations for referencing external programs .................................... 7-4[7.4] Return error codes as strings .................................................... 7-2[7.3] Using language localization ..................................................... 7-1[7.2] Using the built-in function documentation in CATALOG ................................ 7-1[7.1] Create evaluated Y= Editor equations in programs ...................................
7.0 TI Basic Programming Tips
6-131[6.64] Calculate through undef and get correct results ..................................... 6-130[6.63] Faster numerical matrix inverses ................................................ 6-127[6.62] Try asymptotic expansion for functions of large arguments ............................ 6-116[6.61] Find more accurate polynomial roots ............................................. 6-114[6.60] Faster, more accurate exponential integrals ....................................... 6-112[6.59] Accelerate series convergence ................................................. 6-111[6.58] Extract floating-point mantissa and exponent ....................................... 6-110[6.57] Sum binary "1" digits in an integer ............................................... 6-94[6.56] Fourth-order splice joins two functions ............................................ 6-93[6.55] Algorithms for factor() and isPrime() .............................................. 6-92[6.54] Delete variables after using numeric solver ........................................ 6-91[6.53] Implicit derivatives ........................................................... 6-90[6.52] Return complex results in Real mode with 0i ....................................... 6-88[6.51] Review of TI-89 / TI-92 Plus Calculus Tools ....................................... 6-83[6.50] The Savage benchmark .......................................................
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11-4[11.5] Using bounds and estimates with nsolve() ......................................... 11-2[11.4] Using solve() with multiple equations and solutions in programs ........................ 11-1[11.3] Try cZeros() and cSolve() to find real solutions ..................................... 11-1[11.2] zeros() ignores constraint for complex solutions .................................... 11-1[11.1] Try nsolve() if solve() and csolve() fail ............................................
11.0 Solving Tips
10-3[10.6] Add units to built-in Units menu ................................................. 10-2[10.5] Use tmpcnv() to display temperature conversion equations ............................ 10-2[10.4] Add units to undefined variables ................................................ 10-2[10.3] Remove units from numbers .................................................... 10-1[10.2] Convert compound units to equivalent units ........................................ 10-1[10.1] Units calculations are approximate in Auto mode ...................................
10.0 Units Conversion Tips
9-29[9.22] Minimize TI-89 alpha entry inefficiencies .......................................... 9-25[9.21] Programs for simple equation libraries ............................................ 9-24[9.20] Use a graphical equation editor (equation writer) .................................... 9-23[9.19] Use a more efficient RPN interface .............................................. 9-22[9.18] Use multiple commands on entry line with ":" ....................................... 9-21[9.17] Speed up the keyboard ....................................................... 9-20[9.16] Use "Save Copy As" to display the current variable name in editors ..................... 9-20[9.15] [2nd] [ENTER] quickly selects, copies entries to command line ......................... 9-18[9.14] Change Auto/Exact/Approx modes fast ........................................... 9-17[9.13] Disable ALPHA default in TI-89 AMS 2.05 dialog boxes .............................. 9-13[9.12] Use one Request (in a Dialog box) for more than one variable ......................... 9-12[9.11] Access all custom menus from any custom menu ................................... 9-10[9.10] Group fraction digits for easier reading ........................................... 9-10[9.9] Display all 14 significant digits ................................................... 9-9[9.8] Dialog box limitations .......................................................... 9-6[9.7] Creating 'dynamic' dialog boxes .................................................. 9-5[9.6] Position cursor with char(2) ..................................................... 9-4[9.5] Default values for variables in Request ............................................ 9-4[9.4] Displaying more lines on the TI-92 Plus program I/O screen ............................ 9-4[9.3] Take advantage of ok system variable in dialog boxes ................................ 9-2[9.2] User interface considerations .................................................... 9-1[9.1] Use icons in toolbars ..........................................................
9.0 User Interface Tips
8-5[8.8] Relational operators compare strings .............................................. 8-4[8.7] Replacement for mid() and right() functions use position instead of count .................. 8-3[8.6] Convert strings to upper- and lower-case ........................................... 8-3[8.5] string() uses the current number display format ...................................... 8-2[8.4] Count occurrences of a character in a string ........................................ 8-2[8.3] Creating strings that include quote characters ....................................... 8-1[8.2] String substitutions ............................................................ 8-1[8.1] Convert integers to strings without extra characters ..................................
8.0 String Variable Tips
7-64[7.50] Modify loop control variables within the loop ....................................... 7-63[7.49] Read and write text variables ................................................... 7-62[7.48] Create functions in programs ................................................... 7-62[7.47] Global variables not evaluated when local variable has the same name .................. 7-60[7.46] Custom command makes menu labels for trapped function keys ....................... 7-53[7.45] Display text in multiple fonts and Pretty-Print expressions ............................. 7-52[7.44] Local subroutines execute faster than global subroutines ............................. 7-45[7.43] Faster function calls with list and matrix arguments .................................. 7-42[7.42] Find variable names used in expressions .........................................
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E-1

Appendix E: Tip list programs and functions .......................................

D-1

Appendix D: Command quick reference guide .....................................

C-1

Appendix C: Glossary ............................................................

B-33[B.4] Bibliography ................................................................. B-30[B.3] Web sites ................................................................... B-29[B.2] TI Documentation ............................................................. B-1[B.1] FAQs ......................................................................

Appendix B: More resources

A-1

Appendix A: Anti-tips ............................................................

12-2[12.3] TI Basic extension app template ................................................ 12-1[12.2] Use C functions in expressions with AMS 2.05 ..................................... 12-1[12.1] Advantages of TIGCC over TI SDK ..............................................

12.0 C Programming Tips

11-11[11.12] nSolve() may ignore solution constraints ......................................... 11-11[11.11] exp

▶

list() fails with solve() in user functions ....................................... 11-10[11.10] solve() may return false solutions for trigonometric expressions ....................... 11-8[11.9] nSolve() may return "Questionable Accuracy" warning even with good solutions ........... 11-8[11.8] Try solve() for symbolic system solutions .......................................... 11-7[11.7] Saving multiple answers with solve() in program .................................... 11-6[11.6] Use solve() as multiple-equation solver ...........................................

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Contributors are credited in each tip. I would also like to list them here, and thank them again.

Andrew Andy Kenneth Arnold

Alex Astashyn Bez Bhuvanesh Bhatt

Billy Damien Cassou Andrew Cacovean

cj Jordan Clifford cybernesto

Martin Daveluy Stuart Dawson George Dorner

ES Fabrizio Larry Fasnacht

Glenn E. Fisher Lars Frederiksen Gp

John Gilbertson Mike Grass Frank Mori Hess

Titmité Hassan Rick Homard Sam Jordan

Paul King Eric Kobrin Kevin Kofler

Kosh DV Ray Kremer Cass Lewart

Daniel Lloyd Christopher Messick Olivier Miclo

Francesco Orabona Roberto Perez-Franco Mike Roberts

Rick A. Samuel Stearley TipDS

TM Rafael Velazquez Gary Wardall

Frank Westlake Hank Wu ZLX

Contributors

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Various changes:

Page numbering now section-local. New section 12, C Programming Tips. 'More resources material'

divided into lettered appendices. New Appendix E, List of programs and functions.

Contributors:

Correct spelling of Samuel Stearley. New contributors: cybernesto, Carlos Becker, Francesco

Orabona, Hernan Rivera, Rafael Velazquez..

Tips changed:

Introduction: Update Bhuvanesh' URL.

[1.16], [7.8], [7.36], [7.40] Update for new version of copyto_h()

[1.1] Links fixed

[1.10] Add more patents

[1.7] Add Bhuvanesh' method

[2.10] Considerably clarified, thanks to Carlos Becker

[2.13] Limit problem fixed in AMS 2.05

[3.4] Add listrev() function

[4.1] Added when() method

[6.4] Rename to Gamma, log-gamma and factorial functions. Add factorial function.

[9.5] Add method of saving defaults as a list

[9.14] Substantially changed

[B-1] Add actual TI FAQs contents, not just topics.

[B-4] New bibliography

[C] Many corrections and additions.

[D] Correct entries for avgRC(), setMode(), Table, Logistic.

New tips added:

[1.15] Permission to copy TI guidebooks

[1.16] Use your TI-89 / TI-92 Plus as an on-screen ruler and protractor

[1.17] Quick tips

[1.18] Myth and legend from the TI discussion Groups

[1.19] Kraftwerk's "Pocket Calculator" song

[1.20] TI-92 Plus internal photographs

[1.21] TI-89 internal photographs

[1.22] TI Calc-Con '02 trip report

[1.23] Ray Kremer interview on TI Student Feature page

[2.23] Try comDenom() for faster partial factoring

[2.24] Infinity^0 evaluates to 1

[2.25] Factor on complex i to show polynomial complex coefficients

[2.26] limit() fails with piecewise functions

[3.24] Use equations to build lists of lists and matrices

[3.25] Internal error with seq() and Boolean operators in list index calculation

[3.26] Find indices of specific elements in lists and matrices

[3.27] Fast symbolic determinants

[3.28] Fill a list or matrix with a constant

Revision record

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