Defining functions for graphing – Texas Instruments TITANIUM TI-89 User Manual
Page 305

Basic Function Graphing
305
Angle Mode
Angle Mode
Angle 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 Line
Checking 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 Graphing
Defining 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