Q. 293.6( 20 Votes )

Evaluate :



Ans. x cos 2α - sin 2α . log |sin(x + α)| + C

Answer :

Given:




=∫cos 2α dx-sin2α ∫cot(x+α)dx


=x cos 2α-sin 2α×ln|sin(x+α) |+c


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