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intcot^4thetad theta

Answer»

SOLUTION :`intcot^4thetad THETA=intcot^2theta.cot^2thetad theta`
=`intcot^2(cosec^2theta-1)d theta`
=`intcot^2.cosec^2theta d theta-intcot^2thetad theta`
=`intcot^2.cosec^2theta d theta-int(cosec^2theta-1)d theta`
=`-1/3cot^3theta+cottheta+theta+C`


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