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Texas Instruments TI-89 Tip List

Texas Instruments TI-89
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11-4[11.5] Using bounds and estimates with nsolve()
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11-2[11.4] Using solve() with multiple equations and solutions in programs
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11-1[11.3] Try cZeros() and cSolve() to find real solutions
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11-1[11.2] zeros() ignores constraint for complex solutions
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11-1[11.1] Try nsolve() if solve() and csolve() fail
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11.0 Solving Tips
10-3[10.6] Add units to built-in Units menu
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10-2[10.5] Use tmpcnv() to display temperature conversion equations
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10-2[10.4] Add units to undefined variables
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10-2[10.3] Remove units from numbers
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10-1[10.2] Convert compound units to equivalent units
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10-1[10.1] Units calculations are approximate in Auto mode
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10.0 Units Conversion Tips
9-29[9.22] Minimize TI-89 alpha entry inefficiencies
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9-25[9.21] Programs for simple equation libraries
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9-24[9.20] Use a graphical equation editor (equation writer)
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9-23[9.19] Use a more efficient RPN interface
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9-22[9.18] Use multiple commands on entry line with ":"
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9-21[9.17] Speed up the keyboard
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9-20[9.16] Use "Save Copy As" to display the current variable name in editors
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9-20[9.15] [2nd] [ENTER] quickly selects, copies entries to command line
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9-18[9.14] Change Auto/Exact/Approx modes fast
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9-17[9.13] Disable ALPHA default in TI-89 AMS 2.05 dialog boxes
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9-13[9.12] Use one Request (in a Dialog box) for more than one variable
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9-12[9.11] Access all custom menus from any custom menu
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9-10[9.10] Group fraction digits for easier reading
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9-10[9.9] Display all 14 significant digits
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9-9[9.8] Dialog box limitations
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9-6[9.7] Creating 'dynamic' dialog boxes
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9-5[9.6] Position cursor with char(2)
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9-4[9.5] Default values for variables in Request
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9-4[9.4] Displaying more lines on the TI-92 Plus program I/O screen
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9-4[9.3] Take advantage of ok system variable in dialog boxes
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9-2[9.2] User interface considerations
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9-1[9.1] Use icons in toolbars
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9.0 User Interface Tips
8-5[8.8] Relational operators compare strings
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8-4[8.7] Replacement for mid() and right() functions use position instead of count
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8-3[8.6] Convert strings to upper- and lower-case
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8-3[8.5] string() uses the current number display format
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8-2[8.4] Count occurrences of a character in a string
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8-2[8.3] Creating strings that include quote characters
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8-1[8.2] String substitutions
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8-1[8.1] Convert integers to strings without extra characters
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8.0 String Variable Tips
7-64[7.50] Modify loop control variables within the loop
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7-63[7.49] Read and write text variables
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7-62[7.48] Create functions in programs
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7-62[7.47] Global variables not evaluated when local variable has the same name
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7-60[7.46] Custom command makes menu labels for trapped function keys
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7-53[7.45] Display text in multiple fonts and Pretty-Print expressions
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7-52[7.44] Local subroutines execute faster than global subroutines
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7-45[7.43] Faster function calls with list and matrix arguments
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7-42[7.42] Find variable names used in expressions
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Texas Instruments TI-89 Specifications

General IconGeneral
Display size (HxV)100 x 160 mm
Memory type639K FLASH ROM, 188K bytes RAM
Compatible operating systemsOperating System 2.09
Battery typeAAA

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