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December 10th, 2015, 02:57 AM   #1
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integration of volume

I am asked to find the volume revolution of curve about x -axis , but i gt sticked here . I have tried to do the by part method ...how to continue from here?
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December 10th, 2015, 06:45 AM   #2
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This does not need to be done by parts.

Hint

(2-2cost)^1/2=(2)^1/2(1-cost)^1/2
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December 10th, 2015, 09:09 AM   #3
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Another quick hint.

1/2 angle identity:

2^1/2sin(1/2x)=(1-cosx)^1/2
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