यदि $\sin ^{-1}\left(\frac{2 a}{1+a^2}\right)+\cos ^{-1}\left(\frac{1-a^2}{1+a^2}\right)=\tan ^{-1}\left(\frac{2 x}{1-x^2}\right)$ जहाँ $a, x \in(0,1)$,तो $x$ का मान ज्ञात कीजिए।

  • A
    $\frac{a}{2}$
  • B
    $\frac{2 a}{1+a^2}$
  • C
    $\frac{2 a}{1-a^2}$
  • D
    $0$

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यदि $\sin ^{-1} \frac{x}{5}+\sin ^{-1} \frac{4}{5}=\frac{\pi}{2}$ है,तो $x=$ . . . . . . .

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