- #1

Lo.Lee.Ta.

- 217

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2. Would it be correct to write the integral like this?

∫1 to 2 of [[itex]\pi[/itex](4 - sin(√(5x + 3))

^{2}- [itex]\pi[/itex](4 - x)

^{2}]

I am using the washer method, and for the gap that's in the middle I usually think about it by saying r= inner curve - axis of rotation.

R= outer curve - axis of rotation

But in this case the axis of rotation is above the function, so would it be r= 4 - inner curve

and R= 4 - outer curve?

Thanks! :)