PDF chapter test TRY NOW
Prove the following identities, where the angles involved are acute angles for which the expressions are defined.
i. (cosec θ – cot θ)^2 = \frac{1 – cosθ}{1 + cosθ}
ii. \frac{cos A}{1+sin A} + \frac{1+sin A}{cos A} = 2 sec A
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