જો $|Z|=2$, $Z_1=\frac{Z}{2} e^{i \alpha}$ અને $\theta$ એ $\operatorname{amp}(Z)$ હોય, તો $\frac{Z_1^n-Z_1^{-n}}{Z_1^n+Z_1^{-n}}=$

  • A
    $2^n i \tan (n \theta+n \alpha)$
  • B
    $i \tan (n \theta-n \alpha)$
  • C
    $i \tan (n \theta+n \alpha)$
  • D
    $\tan (n \theta+n \alpha)$

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