Texas Instruments TI-89 Titanium User Manual

Operating the Calculator 191
Angle Mode Shows the units in which angle values are interpreted
and displayed. To change the Angle mode, use the
3 key.
RAD Radians
DEG Degrees
Exact/Approx
Mode
Shows how answers are calculated and displayed. To
change the Exact/Approx mode, use the
3 key.
AUTO Auto
EXACT Exact
APPROX Approximate
Graph Number If the screen is split to show two independent graphs,
this indicates which graph is active — G1 or G2.
Graph Mode Indicates the type of graphs that can be plotted. To
change the Graph mode, use the
3 key.
FUNC y(x) functions
PAR x(t) and y(t) parametric equations
POL
r(
q) polar equations
SEQ u(n) sequences
3D z(x,y) 3D equations
DE y'(t) differential equations
Battery Displayed only when the batteries are getting low. If
BATT is shown with a black background, change the
batteries as soon as possible.
Indicator Meaning

Texas Instruments TI-89 Titanium Specifications

General

Brand	Texas Instruments
Model	TI-89 Titanium
Category	Calculator
Language	English