I've ran to this problem again, finding the volume of a graph that revolves around some axis. Whether it's sing cross sections, washer's method, or cylindrical shell's I do know know the difference and when to use them
one question I ran by in my homework says to use cylindrical shells, but how?
and it revolves about
I forgot to mention that there was a hint in the book saying that the integral of sine squared dx is x/2 - (sin2x)/4 + C