Question

Find the maximum value of |r| and any zeros of r.

r = 4 cos 3Ѳ

Answer 1

Step 1:

The polar equation is .

The maximum value of for a polar equation is

.

The maximum value of for a polar equation is

.

Step 2:

The zeros of for a polar equation is

.

The zeros of for a polar equation is
.

Solution :

The maximum value of is .

The zeros of is .