SIR PLEASE PROVE

Asked by gunjansingh | 6th Dec, 2009, 05:49: PM

Expert Answer:

(1-cosA)/(1+cosA)

(1-cosA)2/[(1+cosA)(1-cosA)] =

(1 - 2cosA + cos2A)/(1-cos2A) =

(1 - 2cosA + cos2A)/(sin2A) =

(cosec2A - 2cosAcosec2A + cot2A) =

(cot A - cosecA)2

Regards,

Team,

TopperLearning.

Answered by  | 6th Dec, 2009, 07:37: PM

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