CBSE Class 10 Answered
SIR PLEASE PROVE
Asked by gunjansingh | 06 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 | 06 Dec, 2009, 07:37: PM
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