$\tan \left(\frac{1}{4} \sin ^{-1} \frac{\sqrt{63}}{8}\right)$ का एक संभावित मान है :

  • A
    $\frac{1}{\sqrt{7}}$
  • B
    $2 \sqrt{2}-1$
  • C
    $\sqrt{7}-1$
  • D
    $\frac{1}{2 \sqrt{2}}$

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