Question

) -
(1 - )
cos A) (1 + sec A) = tan A sin A.​

Answer 1

$(1 - cosa)(1 + seca) \\ = (1 - cosa)( \frac{cosa + 1}{cosa} ) \\ = \frac{1 - {cos}^{2} a}{cosa} \\ = \frac{ {sin}^{2}a }{cosa} \\ = \frac{sina}{cosa} .sina \\ = tana \: sina$