Texas Instruments TI-82 STATS Manual Book page 116

Defining and Displaying Polar Graphs
Defining and
Editing Polar
Equations
Selecting and
Deselecting Polar
Equations
Setting Window
Variables
5–4 Polar Graphing
To define or edit a polar equation, follow the steps in Chapter 3
for defining a function or editing a function. The independent
variable in a polar equation is
enter the polar variable
Press „.
Press ƒ ãqä.
The TI-82 STATS graphs only the selected polar equations. In
the editor, a polar equation is selected when the
Y=
highlighted. You may select any or all of the equations.
To change the selection status, move the cursor onto the
and then press Í.
To display the window variable values, press p. These
variables define the viewing window. The values below are
defaults for graphing in
Pol
qmin=0
qmax=6.2831853...
qstep=.1308996...
Xmin=L10
Xmax=10
Xscl=1
Ymin=L10
Ymax=10
Yscl=1
Note: To ensure that sufficient points are plotted, you may want to
change the window variables.
q
(continued)
. In graphing mode, you can
Pol
q
in either of two ways.
q
angle mode.
Radian
Smallest value to evaluate
q
Largest value to evaluate (2p)
q
Increment between
Smallest value to be displayed
X
Largest value to be displayed
X
Spacing between the
Smallest value to be displayed
Y
Largest value to be displayed
Y
Spacing between the
sign is
=
sign,
=
values (pà24)
q
tick marks
X
tick marks
Y