Prove that (1+tan2a) + (1+cot2a) = 1/sin2a-sin4a

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(1+tan2a) + (1+cot2a) = 1/sin2a-sin4a

prove that (1+1/tan2a)(1+1/cot2a)=1/sin2a-sin4a

Prove that (1+tan^2A)+(1+1/tan^2A)=1/(sin^2A-sin^4A)
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