Question

How do you graph `r=4costheta`?

Answer 1

Set your compass at `r = 2` put the center at the polar point `(2, 0)` and draw a circle.

Explanation:

The above answer assumes that you have polar graph paper and a drafting compass.

If you convert to the given equation to rectangular form, you discover that it is a circle with its center a `(2,0)` and a radius, `r = 2`

`(x - 2)^2 + y^2 = 2^2`

But I gave you the answer with the center point in polar coordinates.