# math

posted by
**hamlet**
.

Find the volume of the solid obtained by rotating the region bounded by the given curves about the specified axis.

y=0, y= \cos(x), x = \frac{\pi}{2}, x = 0 about the axis y= -3

You might need to use the identity: cos^2(x) = \frac{1}{2}(cos(2x) + 1).