MY= 2cot-0sec 0-1sec 0 +1.-20 cosec – InterviewSolution

1.

MY= 2cot-0sec 0-1sec 0 +1.-20 cosec

Answer»

1/secA-1 -1/secA+1=secA+1-(secA-1)/(secA-1)(sec+1)= secA+1-secA+1/sec^2-1=2/tan^2A=2×1/tan^2A.= 2cot^2A

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