question_answer

\[\underset{x\to \pi /6}{\mathop{\lim }}\,\left[ \frac{3\sin x-\sqrt{3}\cos x}{6x-\pi } \right]\]

A)  \[\sqrt{3}\]                   

B)  \[\frac{1}{\sqrt{3}}\]

C)  \[-\frac{1}{\sqrt{3}}\]   

D)  \[-\frac{1}{3}\]