Texas Instruments TI-89 Titanium User Manual

Additional Graphing Topics 460
• Execute the ClrGraph command (available from the Home screen’s † Other toolbar
menu).
– or –
• Display the Y= Editor. The next time you display the Graph screen, it will use the
functions selected on the Y= Editor.
Extra Benefits of User-Defined Functions
You can define a user-defined function in terms of any independent variable. For
example:
and:
Graphing a Piecewise Defined Function
To graph a piecewise function, you must first define the function by specifying
boundaries and expressions for each piece. The
when function is extremely useful for
Define f1(aa)=1.25aaùcos(aa)
Graph f1(x)
Define f1(aa)=1.25aacos(aa).
Refers to the function by using the native
independent variable.
Define f1(aa)=1.25aaùcos(aa)
f1(x)
!y1(x)

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