$|x| < \frac{1}{\sqrt{2}}, x \neq 0$ के लिए $\tan ^{-1}\left(\frac{\sqrt{1+x^2}+\sqrt{1-x^2}}{\sqrt{1+x^2}-\sqrt{1-x^2}}\right)$ का मान ज्ञात कीजिए।

  • A
    $\frac{\pi}{4}+\frac{1}{2} \cos ^{-1} x^2$
  • B
    $\frac{\pi}{4}+\cos ^{-1} x^2$
  • C
    $\frac{\pi}{4}-\frac{1}{2} \cos ^{-1} x^2$
  • D
    $\frac{\pi}{4}-\cos ^{-1} x^2$

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