ever use the method of cylindrical shells?
I would like to know if I have set this up correctly:
Find the volume of a solid obtained by rotating the region bound by y = cos^2 (x) , -pi/2 < x < pi/2, y = 1/4 about the line x = pi/2.
I came up with
2 pi Integral from -pi/2 to 0 of (1+x)(cos^2x - pi/2)
2 pi Integral from 0 to pi/2 of (1-x)(cos^2x - pi/2)
Does this seem OK?