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Question

Prove the following trignometric identities:

(1+cot2 A) sin2 A=1

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Solution

(1 + Cot2 A) Sin2 A = 1

Ans:

We know

cosec2θcot2θ=1

=>(1+cot2θ)sin2θ =cosec2θsin2θ

=(cosecθsinθ)2

=(1sinθsinθ)2

=(1)2 = 1


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