If $\tan 2\theta \tan \theta = 1$, then the general value of $\theta $ is

  • A

    $\left( {n + \frac{1}{2}} \right)\frac{\pi }{3}$

  • B

    $\left( {n + \frac{1}{2}} \right)\,\pi $

  • C

    $\left( {2n \pm \frac{1}{2}} \right)\frac{\pi }{3}$

  • D

    None of these

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