Texas Instruments TI-89 Voyage 200, User Manual

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Additional Graphing Topics
Additional Graphing Topics Additional Graphing Topics
Additional Graphing Topics
From the Home screen, graph the piecewise defined function: y =
L
x 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 Display
1. Display the
MODE
dialog box. For
Graph
mode, select
FUNCTION
. For
Angle
mode,
select
RADIAN
.
Press
3 B
1
D D D B
1
¸
2. Display the Home screen. Use the
Graph
command and the
when
function to
specify the piecewise defined function.
†
2
selects
Graph
from the
Other
toolbar
menu and automatically adds a space.
Press
"
†
2
2
™
WHEN
j
c
X
2 Â
0
b ?
X
b
5
p 2
X
X
d d
3. Execute the
Graph
command, which
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
¸
Graph when(x<0,
L
x,
5 … cos(x))