Texas Instruments Titanium TI-89 User Manual

Basic Function Graphing 305
Angle Mode
Angle ModeAngle Mode
Angle Mode
When using trigonometric functions, set the Angle mode for the units (RADIAN,
DEGREE or GRADIAN) in which you want to enter and display angle values.
Checking the Status Line
Checking the Status LineChecking the Status Line
Checking the Status Line
To see the current Graph mode and Angle mode, check the status line at the bottom of
the screen.
Defining Functions for Graphing
Defining Functions for GraphingDefining Functions for Graphing
Defining Functions for Graphing
In FUNCTION graphing mode, you can graph functions named y1(x) through y99(x). To
define and edit these functions, use the Y= Editor. (The Y= Editor lists function names for
POLAR
r(
q) polar equations
SEQUENCE u(n) sequences
3D z(x,y) 3D equations
DIFFERENTIAL EQUATION y'(t) differential equations
Graph Mode Setting Description
Angle
Mode
Graph
Mode

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)