Steps 
Key Sequence 
Screens 
1. Change MODE 
Press MODE key 


Press right arrow key 


Press 3 (for 3:POLAR) 


Press ENTER (to Save) 

2. Input Equation into r1 
Press DIAMOND key, then F1 (for Y=) 


Type equation^{*}, then ENTER 

^{*}Use theta for the independent variable by pressing the 'diamond' key, then
the caret (i.e., ^) key. 
3. Graph Equation 
Press DIAMOND key, then F3 (for GRAPH) 

NOTE 1: You can ZOOM, TRACE and evaluate the same as with cartesian functions. 
NOTE 2: ZoomSqr is probably best for polar equations. 