Wed February 18, 2009 By:


Expert Reply
Wed February 18, 2009

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.


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