cosec A(1+cos A)(cosec A-cot A)=1
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cosecA(1+cosA)(1\sinA-cosA\sinA)
cosecA(1+cosA)(1-cosA/sinA)
cosecA(1sq-cos squareA/sinA)
cosecA(sin2A/sinA)
cosecA.sinA
1/sinA.sinA=1
hence proved
hope helpful
rawatyash1122:
thanks bhai
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