Texas Instruments TI-89 Benutzerhandbuch
![Texas Instruments](https://files.manualsbrain.com/attachments/b46f99d826b2b0e0e5f558c5fb6483942eb9216b/common/fit/150/50/c15ea36eb1fb1cce99a3b94668675bfc78ce832d8d727d9a7bb51a125510/brand_logo.gif)
3D Graphing
376
Exploring the Graph
Exploring the Graph
Exploring the Graph
Exploring the Graph
From the Graph screen, you can:
•
Trace the equation.
•
Use the
„
Zoom
toolbar menu to zoom in or out on a portion of the graph. Some of
the menu items are dimmed because they are not available for 3D graphs.
•
Use the
‡
Math
toolbar menu to evaluate the equation at a specified point. Only
1:Value
is available for 3D graphs.
You can also evaluate
z(x,y)
while tracing. Type the x value and press
¸; then type
the y value and press
¸.
5. Change the graph format if necessary.
ƒ
9
– or -
8 Í
Note:
To help you see the orientation of
3D graphs, turn on
Axes and Labels
.
6. Graph the selected equations
(
8 %).
Note:
Before displaying the graph, the
screen shows the “percent evaluated.”