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I have posted a link there to this thread to the OP can view my work.Volume obtained by rotating the region between y=sinx and y=cosx from x=pi/2 to x=pi around the line y=2?

Find the Volume obtained by rotating the region between y=sinx and y=cosx from x=pi/2 to x=pi around the line y=2.

I'm so confused about the y= 2 part, and help would be greatly appreciated!

Hint: Cos(x)^2-sin(x)^2=cos(2x)