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Prove that cot(180° + θ)sin(90° - θ)cos(-θ)/sin(270° + θ)tan(-θ)cosec(360° + θ) = cos2 θ cot θ. 

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Best answer

cot(180° + θ) = cot θ 

sin (90° – θ) = cos θ 

cos(-θ) = cos θ 

sin (270° + θ) = – cos θ 

tan(-θ) = -tan θ

cosec (360° + θ) = cosec θ

∴ LHS 

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