Texas Instruments TI-89 사용자 설명서

Basic Function Graphing

305

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

To see the current Graph mode and Angle mode, check the status line at the bottom of
the screen.

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

)

polar equations

SEQUENCE

u(n)

sequences

z(x,y) 3D equations

DIFFERENTIAL EQUATION

y'(t)

differential equations

Graph Mode Setting

Description

Angle
Mode

Graph
Mode