Question from trigonometric identities.
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1 .Prove that, √{(sec θ – 1)/(sec θ + 1)} = cosec θ - cot θ.
2. tan4 θ + tan2 θ = sec4 θ - sec2 θ
3.. (1 - sin A)/(1 + sin A) = (sec A - tan A)2
2. tan4 θ + tan2 θ = sec4 θ - sec2 θ
3.. (1 - sin A)/(1 + sin A) = (sec A - tan A)2
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