atan(sqrt((-cos(x) %2B 1)/(cos(x) %2B 1))) – InterviewSolution

InterviewSolution

1.	atan(sqrt((-cos(x) %2B 1)/(cos(x) %2B 1)))
Answer» tan^-1(√1-cosx/1+cosx)tan^-1(√2sin^2x/2/2cos^2x/2)tan^-1(tanx/2)X/2

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