Question

Solve the following trigonometric question:
cos x=3 cos x-2

Answer 1

x = 0°

Explanation:

`\cos x = 3 \cos x - 2 \\ 2 = 3 \cos x - \cos x \\ 2 = 2\cos x \\ \cos x = (2)/(2) \\ \cos x =1 \\ \cos x =\cos 0 \degree \\ \huge \red{ \boxed{x = 0 \degree}} \\`