Question

sin (1 + cot ) = sin + cos x​

Answer 1

Explicación paso a paso:

$\sin(a)(1 + \cot(a) ) = \sin(a) + \sin(a) \cot(a) \\ = \sin(a) + \sin(a) \frac{ \cos(a) }{ \sin(a) } \\ = \sin(a) + \cos(a)$