If $\frac{\tan 3\theta - 1}{\tan 3\theta + 1} = \sqrt{3}$,then the general value of $\theta$ is

  • A
    $\frac{n\pi}{3} + \frac{\pi}{12}$
  • B
    $\frac{n\pi}{3} + \frac{7\pi}{36}$
  • C
    $n\pi + \frac{7\pi}{12}$
  • D
    $n\pi + \frac{\pi}{12}$

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