Texas Instruments TI-89 Titanium User Manual

Symbolic Manipulation 259
In some cases, you may be able to create an equivalent single-statement function. For
example, consider a piecewise function with two pieces.
• If you were to create a multi-statement user-defined function with the form:
Note: To select nInt from the Calc toolbar menu, press … B:nInt.
When: Use expression:
x < 0
x
| 0
Lx
5 cos(x)
Func
If x<0 Then
Return ëx
Else
Return 5cos(x)
EndIf
EndFunc
Then numerically integrate
y1(x) with
respect to x.
Define
y1(x)=Func:If x<0
Then: ... :EndFunc

Texas Instruments TI-89 Titanium Specifications

General

Display Type	LCD
Display Resolution	160 x 100 pixels
CPU	Motorola 68000
CPU Speed	16 MHz
RAM	256 KB
Flash ROM	2.7 MB
Programming Language	TI-BASIC, Assembly
Power Source	4 AAA batteries
Connectivity	I/O port
Dimensions	7.5 x 3.5 x 1 inches