Texas Instruments TITANIUM TI-89 User Manual
Page 346
Polar Graphing
346
During a trace, you can also evaluate
r(
q
)
by typing the q value and pressing ¸.
Note:
You can use QuickCenter at any time during a trace, even if the cursor is still on
the screen.
…
Trace
Lets you move the cursor along a graph one
q
step
at a
time.
•
When you begin a trace, the cursor is on the first selected
equation at
q
min
.
•
QuickCenter applies to all directions. If you move the
cursor off the screen (top or bottom, left or right), press
¸
to center the viewing window on the cursor
location.
•
Automatic panning is not available. If you move the cursor
off the left or right side of the screen, the TI-89 Titanium /
Voyage™ 200 Graphing Calculator will not automatically
pan the viewing window. However, you can use
QuickCenter.
‡
Math
Only 1:Value, 6:Derivatives, 9:Distance, A:Tangent, and
B:Arc are available for polar graphs. These tools are
based on
q
values. For example:
•
1:Value
displays an
r
value (or x and y, depending on the
graph format) for a specified
q
value.
•
6:Derivatives
finds
dy/dx
or
dr/d
q
at a point defined for
a specified
q
value.
Tool
For Polar Graphs: