December 10th, 2015, 02:57 AM  #1 
Member Joined: Dec 2015 From: malaysia Posts: 66 Thanks: 1  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?

December 10th, 2015, 06:45 AM  #2 
Newbie Joined: Dec 2015 From: Northwest Posts: 22 Thanks: 1 
This does not need to be done by parts. Hint (22cost)^1/2=(2)^1/2(1cost)^1/2 
December 10th, 2015, 09:09 AM  #3 
Newbie Joined: Dec 2015 From: Northwest Posts: 22 Thanks: 1 
Another quick hint. 1/2 angle identity: 2^1/2sin(1/2x)=(1cosx)^1/2 

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