Asked by | 18th Feb, 2009, 07:57: PM
we can write sin5x = sin4x sinx = ( 1- cos2x)2 sinx
now if we put cosx = t then we get -sinx dx = dt
so now we have to integrate -( 1- t2)2 dt which can be solved easily.
similarly we can solve the other half.
Answered by | 18th Feb, 2009, 09:52: PM
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