Question

How do you graph `r = 5cos(theta)`?

Answer 1

Draw the circle with center at polar (5/2, 0) and radius 5/2.

Explanation:

r = d cos`theta` represents the circle with center at ( d/2, 0) and radius d/2.
Rotation of this circle through `pi`/2, about pole r = 0, in the #theta$-increasing sense, gives the circle r = d sin d.i