Prove the following identities : = 1\(1 + cos A) + 1\(1 - cos A) = 2 cosec^2 A

Solving L.H.S. of the equation : By formula, 1 - cos 2 A = sin 2 A Since, L.H.S. = R.H.S. Hence, proved that = 2 cosec 2 A.