If $\sin \left( \frac{\pi }{4} \cot \theta \right) = \cos \left( \frac{\pi }{4} \tan \theta \right)$,then $\theta = $

  • A
    $n\pi + \frac{\pi }{4}$
  • B
    $2n\pi \pm \frac{\pi }{4}$
  • C
    $n\pi - \frac{\pi }{4}$
  • D
    $2n\pi \pm \frac{\pi }{6}$

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