Use a cosine R-form to solve$$\sqrt3\cos x-\sin x=1,\qquad 0^\circ\le x

Question

Use a cosine R-form to solve$$\sqrt3\cos x-\sin x=1,\qquad 0^\circ\le x<360^\circ.$$ Give exact answers.

Accepted Answer

$x=30^\circ,270^\circ$.

Trigonometry