Question

$\int \frac{cos\ 2x}{(sin\ x+cos\ x)^2} \, dx$ is equal to,
(A) $\frac{-1}{sin\ x+cos\ x} +C$
(B) log |sin x + cos x |+C
(C) log |sin x - cos x |+ C
(D) $\frac{-1}{(sin\ x+cos\ x)^2} +C$

Answer 1

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