Question

Which of the following represents the area common to the two regions bounded by r = -6 cos(x) and
r = 2 - 2 cos(x)?

Answer 1

here is a graph of both functions from 0 to 2pi
to find where they intersect just set them equal to each other
-6cos = 2-2cos
-4cos = 2
cos = -1/2
--> x = 2pi/3 and 4pi/3