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Polar Graphing

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.



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