Prove That: Cos^2 a + 1/(1 + Cot^2 A) = 1

Prove that: `cos^2 A + 1/(1 + cot^2 A) = 1`.

Sum

LHS = `cos^2 A + 1/(cosec^2 A)`

= cos²A + sin²A

= 1

= RHS

Hence proved.

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