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Prove that : tan θ/(1 − cot θ) + cot θ/(1 − tan θ) = 1 + sec θ cosec θ
If sin 3A = 1, then find the value of cos 2A – tan² 45°.
If (sec A + tan A) (1 – sin A) = k cos A, then find the value of k.
If √3 sin θ = cos θ, then value of θ is
From a point on the ground, the angle of elevation of the bottom and the top of a transmission tower fixed at the top of a 20 m high building are 45° and 60° respectively. Find the height of the tower.
If cosec A = 7/5, then value of tan A . cos A is :
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