Consider the following.
y = 9 cos4 x, y = -9 cos4 x, -π/2 ≤ x ≤ π/2; about x = π
(a) Set up an integral for the volume V of the solid obtained by rotating the region bounded by the given curve about the specified axis.
V =
π/2
* integral sign* (Put answer here)
-π/2
dx
(b) Use your calculator to evaluate the integral correct to five decimal places.