Phương trình \(3{\tan ^2}x + \left( {6 - \sqrt 3 }...

Câu hỏi: Phương trình \(3{\tan ^2}x + \left( {6 - \sqrt 3 } \right)\tan x - 2\sqrt 3  = 0\) có nghiệm là :

A \(\left[ \begin{array}{l}x = \dfrac{\pi }{6} + k2\pi \\x = {\rm{arctan}}\left( { - 2} \right) + k2\pi \end{array} \right.\)

B \(\left[ \begin{array}{l}x = \dfrac{\pi }{3} + k\pi \\x = {\rm{arctan}}\left( { - 2} \right) + k\pi \end{array} \right.\)

C \(\left[ \begin{array}{l}x = \dfrac{\pi }{6} + k\pi \\x = {\rm{arctan}}\left( { - 2} \right) + k\pi \end{array} \right.\)

D \(\left[ \begin{array}{l}x = \dfrac{\pi }{6} + k\pi \\x =  - {\rm{arctan}}\left( 2 \right) + k\pi \end{array} \right.\)