cosec a /cosec a -1 +cosec a/cosec a+1 =2sec a prove this
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LHS = cosecA (cosecA+1)+cosecA(cosecA-1) / cosec^2A -1
= cosecA (cosecA+1+cosecA-1) / cot^2A
= 2cosec^2A / cot^2A
= 2 / sin^2A / cos^2A / sin^2A
= 2 / cos^2
= 2sec^2A
RHS = 2sec^2A
LHS=RHS
= cosecA (cosecA+1+cosecA-1) / cot^2A
= 2cosec^2A / cot^2A
= 2 / sin^2A / cos^2A / sin^2A
= 2 / cos^2
= 2sec^2A
RHS = 2sec^2A
LHS=RHS
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