Question

Find the value of cos(270+-x)
in terms of sin & cos?

Answer 1

ANSWER :

$\cos(270 - x) = - sinx$

Answer 2

Answer:

$\cos(270 + ( - x)) \\ \cos(270 - x) \\ \\ \\ using \: formula \: \\ = \cos(a - b) = \cos(a) \times \cos(b) + \sin(a) \times \sin(b) \\ \cos(270) \times \cos(x) + \sin(270) \times \sin(x) \\ \\ convert \: 270 \: into \: radian \: we \: will \: get \: \frac{3\pi}{2} \\ \\ \cos( \frac{3\pi}{2} ) \cos(x) + \sin( \frac{3\pi}{2} ) \sin(x) \\ \cos(\pi + \frac{\pi}{2} ) \cos(x) + \sin(\pi + \frac{\pi}{2} ) \sin(x) \\ - \cos( \frac{\pi}{2} ) \cos(x) - \sin( \frac{\pi}{2} ) \sin(x) \\ 0 \times \cos(x) - 1 \times \sin(x) \\ - \sin(x)$

I hope u will find ur answer plz mark brainliest answer