Question

cos A (1 + cot A) + sin A (1 + tan A)
= sec A + cosec A

Answer 1

Step-by-step explanation:

$\cos(a) (1 + \cot(a) ) + \sin(a)(1 + \tan(a) ) \\ \cos(a) \csc(a) + \sin(a) \sec(a) \\ \sec(a) + \csc(a)$