Texas Instruments Titanium TI-89 User Manual

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4. Draw a horizontal line across the top of
the cosine curve.
The calculator remains in “horizontal”
mode until you select a different operation
or press N.
Press 2 ‰ 5 C (until the line is
positioned) ¸
5. Save a picture of the graph. Use
PIC1 as
the variable name for the picture.
Be sure to set
Type = Picture. By default, it
is set to
GDB.
Press , 2 B 2 D D PIC j 1 ¸
¸
6. Clear the drawn horizontal line.
You can also press † to regraph.
Press 2 ˆ 1
Steps and keystrokes Display

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)