Question

how...........???????

Answer 1

$\cos( \frac{\pi}{2} - x) = cos \frac{\pi}{2}.cos(x) + \sin( \frac{\pi}{2} ). \sin(x) \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 0. \cos(x) + 1. \sin(x) \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 0 + \sin(x) = \sin(x)$

Answer 2

Answer:

ooooooooooooooooooo

Step-by-step explanation:

thanks