Texas Instruments TITANIUM TI-89 User Manual page 111

Steps and keystrokes
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
the variable name for the picture.
Be sure to set
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
Previews
. By default, it
Type = Picture
Display
as
PIC1
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