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(CosecA+Cot A)²=1+CosA/1-CosA
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Answer:
L.H.S.
=(1/sinA -cosA/sinA)^2
=(1-cosA)^2/sin^2A
=(1-cosA)^2/(1-cos^2A)
=(1-cos)A)^2/(1-cosA)(1+cosA)
=(1-cosA)/(1+cosA). Proved.
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