Texas Instruments Titanium TI-89 User Manual

Additional Graphing Topics 476
two-piece functions. For three or more pieces, it may be easier to create a multi-
statement, user-defined function.
Using the When Function
Using the When FunctionUsing the When Function
Using the When Function
To define a two-piece function, use the syntax:
when(condition, trueExpression, falseExpression)
For example, suppose you want to graph a function with two pieces.
For three or more pieces, you can use nested
when functions.
When: Use expression:
x < 0
Mx
x | 0
5 cos(x)
In the Y= Editor:
The function is “pretty
printed” in this form.
Enter the function in this
form.

Texas Instruments Titanium TI-89 Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
Memory	188 KB RAM, 2.7 MB Flash ROM
Type	Graphing Calculator
Display	Monochrome
Processor	Motorola 68000
Processor Speed	12 MHz
Power Source	4 AAA batteries
Connectivity	USB
Programming	TI-BASIC, Assembly
Operating System	AMS (Advanced Mathematics Software)