NCERT Exercise 8.3 - Q4(ii) - Introduction to Trigonometry
Question: Prove the following identities, where the angles involved are acute angles for which the expressions are defined. (ii) cos A/(1 + sin A) + (1 + sin A)/cos A = 2 sec A
Answer: cos A/(1 + sin A) + (1 + sin A)/cos A = 2 sec A.
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