Texas Instruments TITANIUM TI-89 - Manual (Page 101)

Previews 101
3D Graphing 3D Graphing 3D Graphing 3D Graphing
Graph the 3D equation z(x,y) = (x
3
y N y
3
x) / 390. Animate the graph by using the cursor
to interactively change the eye Window variable values that control your viewing angle.
Then view the graph in different graph format styles.
Steps and keystrokes Display
1. Display the MODE dialog box. For Graph
mode, select 3D .
Press 3 B 5 ¸
2. Display and clear the Y= Editor . Then
define the 3D equation
z1(x,y) = (x
3
y N y
3
x) / 390.
Notice that implied multiplication is used
in the keystrokes.
Press 8 # , 8 ¸ ¸ c X Z 3
Y | Y Z 3 X d e 390 ¸
3. Change the graph format to display and
label the axes. Also set Style = WIRE
FRAME .
You can animate any graph format style,
but
WIRE FRAME is fastest.
Press 8 Í D B 2 D B 2 D B 1 ¸