Texas Instruments TI-89 Manual Book page 6

Chapter 3:
Symbolic
Manipulation
Chapter 4:
Constants and
Measurement Units
Chapter 5:
Additional Home
Screen Topics
Chapter 6:
Basic Function
Graphing
Chapter 7:
Parametric
Graphing
iv
Preview of Symbolic Manipulation ........................................................ 58
Using Undefined or Defined Variables .................................................. 59
Using Exact, Approximate, and Auto Modes ....................................... 61
Automatic Simplification......................................................................... 64
Delayed Simplification for Certain Built-In Functions........................ 66
Substituting Values and Setting Constraints ........................................ 67
Overview of the Algebra Menu............................................................... 70
Common Algebraic Operations .............................................................. 72
Overview of the Calc Menu..................................................................... 75
Common Calculus Operations................................................................ 76
User-Defined Functions and Symbolic Manipulation ......................... 77
If You Get an Out-of-Memory Error....................................................... 79
Special Constants Used in Symbolic Manipulation ............................. 80
Preview of Constants and Measurement Units .................................... 82
Entering Constants or Units ................................................................... 83
Converting from One Unit to Another................................................... 85
Setting the Default Units for Displayed Results .................................. 87
Creating Your Own User-Defined Units ................................................ 88
List of Pre-Defined Constants and Units............................................... 89
Saving the Home Screen Entries as a Text Editor Script ................... 94
Cutting, Copying, and Pasting Information .......................................... 95
Creating and Evaluating User-Defined Functions ............................... 97
Using Folders to Store Independent Sets of Variables ..................... 100
If an Entry or Answer Is "Too Big" ...................................................... 103
Preview of Basic Function Graphing................................................... 106
Overview of Steps in Graphing Functions .......................................... 107
Setting the Graph Mode......................................................................... 108
Defining Functions for Graphing ......................................................... 109
Selecting Functions to Graph ............................................................... 111
Setting the Display Style for a Function.............................................. 112
Defining the Viewing Window .............................................................. 113
Changing the Graph Format ................................................................. 114
Graphing the Selected Functions......................................................... 115
Displaying Coordinates with the Free-Moving Cursor...................... 116
Tracing a Function ................................................................................. 117
Using Zooms to Explore a Graph......................................................... 119
Using Math Tools to Analyze Functions ............................................. 122
Preview of Parametric Graphing.......................................................... 128
Overview of Steps in Graphing Parametric Equations ..................... 129
Differences in Parametric and Function Graphing ........................... 130