Question

Solve:
$2cos^{2} x + \sqrt{3} cosx + 1 = 0$

Answer 1

$= > 2 \cos^{2} (x) + \sqrt{3} \cos(x) + 1 = 0$

Since, it's a quadratic in cos(x), so I'm going to find its discriminant.

=> b² - 4ac = (√3)² - 4(2)(1) = -5

Hence, the given equation has no real solution. This can also be put like, if you plot the graph of this equation, it'll not cut the x- axis.

Hope, it'll help you.....

Answer 2

Answer:

I HOPE IT'S HELP YOU

SORRY IF IN MY ANSWER ANY MISTAKE