Texas Instruments TI-89 Voyage 200, User Manual

Page: 336 / 1008

Basic Function Graphing 336
2. As necessary, use
D
and
C
to select the function for the first point.
3. Set the first point. Either use
A
or
B
to move the cursor to the point or type its x
value.
4. Press
¸
. A
+
marks the point.
5. If the second point is on a different function, use
D
and
C
to select the function.
6. Set the second point. (If you use the cursor to set the point, a line is drawn as you
move the cursor.)
Drawing a Tangent Line Drawing a Tangent Line Drawing a Tangent Line Drawing a Tangent Line
1. From the
Graph
screen, press
‡
and select
A:Tangent
.
2. As necessary, use
D
and
C
to select the applicable function.
Note:
To erase a drawn tangent line, press
†
(
ReGraph
).
7. Press
¸
.
The distance between the two points is
displayed, along with the connecting line.
3. Set the tangent point. Either move the
cursor to the point or type its x value.
4. Press
¸
.
The tangent line is drawn, and its
equation is displayed.