Texas Instruments TI-89 Titanium User Manual page 102

Steps and keystrokes
4. Draw a horizontal line across the top of
the cosine curve.
The calculator remains in "line" mode until
you select a different operation or press
N.
@ 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
@ , 2 B 2 D D PIC j 1 ¸
¸
6. Clear the drawn horizontal line.
You can also press † to regraph.
@ 2 ˆ 1
7. Open the saved picture variable to
redisplay the graph with the line.
Be sure to set
is set to .
GDB
Press , 1 B 2 (if not already shown,
also set Variable = pic1) ¸
Previews
. By default, it
Type = Picture
. By default, it
Type = Picture
Display
as
PIC1
99