Question

OR Prove that (sec A+ tan A)(1 – sin A) = cos A ​

Answer 1

Prove that (sec A + tan A)(1 – sin A) = cos A. (a + b)(a – b)= a2 – b2, So, (1 + sin A)(1 – sin A) = 1 – sin2A. Hence, the value of (sec A + tan A) (1 – sin A) is equal to cos A.

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