જો $n$ એક પૂર્ણાંક હોય અને $Z = \cos \theta + i \sin \theta$,જ્યાં $\theta \neq (2n + 1) \frac{\pi}{2}$,તો $\frac{1 + Z^{2n}}{1 - Z^{2n}} = $

  • A
    $i \tan n \theta$
  • B
    $i \cot n \theta$
  • C
    $-i \tan n \theta$
  • D
    $-i \cot n \theta$

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