To graph an equation in polar form, set the
calculator MODE to polar (POL).→
If you want to see your TRACE
in terms of r and ,
change FORMAT (2nd ZOOM) to PolarGC. 



Examples:
1. Graph 
Enter the equation into Y=:

Choose ZOOM #6 ZStandard 
Choosing #6 ZStandard
will set the window as follows:
with the x and y values in the normal 10 to10
configuration 

Graph
(using the ZOOM #6 ZStandard)
Because the Standard viewing window has a 3 to 2 aspect
ratio (it is not evenly divided on both axes)., the graphs may appear
slightly distorted. 
Graph
(using the ZOOM #5 ZSquare)
To prevent distortion,
choose ZOOM #5 ZSquare.

Choosing #5 ZSquare will
also set the window as follows:
but
with the x and y values in the 15.16129 to
15.16129
configuration. 

Trace
Notice that x and y are displayed. The calculator
FORMAT is set to the default value
of RectGC. 
Trace
Notice that r and are displayed. The calculator FORMAT is set to PolarGC.


2. Graph
Enter the equation into Y=:

Choose ZOOM #5 ZSquare

Trace

3. Find r from
the graph screen of
when
You can find the value of a function from the graph screen in two
ways:
Method 1: 
 by using the VALUE function
in the CALC
(2nd TRACE) menu:
This screen will appear....

If the FORMAT (2nd
ZOOM) is set to
RECTGC you will see the x and y coordinates...
If the FORMAT
is set to POLARGC
you will see the r and theta coordinates...




Method 2: 
 simply hit TRACE
and enter the
theta value right on the graphing screen.

If the FORMAT
is set to POLARGC,
you will see the r value answser.

