Additional Graphing Topics - Texas Instruments TI-89 Titanium Short User Manual

Additional Graphing Topics

From the Home screen, graph the piecewise defined function: y = Lx
when x < 0 and y = 5 cos(x) when x ‚ 0. Draw a horizontal line across the
top of the cosine curve. Then save a picture of the displayed graph.
Steps and keystrokes
1. Display the
mode, select
select
RADIAN
Press 3 B 1 D D D B 1 ¸
2. Display the Home screen. Use the
command and the
the piecewise defined function.
† 2 selects
menu and automatically adds a space.
@ " † 2 2 ™ WHEN j c X
2 Â 0 b ? X b 5 p 2 X X d d
3. Execute the
automatically displays the Graph screen.
The graph uses the current Window
variables, which are assumed to be their
standard values („ 6) for this example.
Press ¸
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 PIC1 as the
variable name for the picture.
Be sure to set
is set to
GDB
@ , 2 B 2 D D PIC j 1 ¸ ¸
66
dialog box. For
MODE
. For
FUNCTION
.
function to specify
when
from the
Graph
command, which
Graph
Type = Picture
.
Graph
mode,
Angle
Graph
toolbar
Other
. By default, it
Display
Graph when(x<0,
...
5 cos(x))
Previews
L
x,