Question

guys what will be the answer of this question?

Answer 1

Answer:

heya mate ur answer is in attachment ❣❣❣❣❣❣❣❣

Answer 2

$\sqrt{2} \cos(x) + 1 = 0 \\ \\ \sqrt{2} \cos(x) = - 1 \\ \\ \cos(x) = \frac{ - 1}{ \sqrt{2} } \\ \\ x = \frac{ +}{-} \frac{3\pi}{4} \\ \\ ans = x = \frac{3\pi}{4} and \: x = \frac{ - 3\pi}{4} \: or \: \frac{5\pi}{4}$