∫cos 2x/(sin x + cos x)2 dx = (a) 1/(sin x + cos x) + c(b) log(sin – InterviewSolution

1.	∫cos 2x/(sin x + cos x)2 dx = (a) 1/(sin x + cos x) + c(b) log(sin x + cos x) + c(c) log\|sin x + cos x\| + c(d) 1/(sin x + cos x )2 + c
Answer» Answer is (b) log(sin x + cos x) + c

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