Giải phương trình:

sin x – $\sqrt 3$cos x = 0

$\Leftrightarrow \frac{1}{2}\sin x - \frac{{\sqrt 3 }}{2}\cos x = 0$

$\Leftrightarrow \sin x\cos \frac{\pi }{3} - \cos x\sin \frac{\pi }{3} = 0$

$\Leftrightarrow \sin \left( {x - \frac{\pi }{3}} \right) = 0$

$\Leftrightarrow x - \frac{\pi }{3} = k\pi \,\,\,\,\,\left( {k \in \mathbb{Z}} \right)$