$x > 0$ માટે $\tan ^{-1} \frac{1-x}{1+x}=\frac{1}{2} \tan ^{-1} x$ ઉકેલો.

  • A
    $x=\frac{1}{\sqrt{2}}$
  • B
    $x=\frac{1}{\sqrt{3}}$
  • C
    $x=\frac{1}{2}$
  • D
    $x=\sqrt{3}$

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