यदि $y = \tan^{-1} \left( \frac{\sqrt{1+x^2}-1}{x} \right)$ है,तो $y'(1)$ का मान ज्ञात कीजिए।

  • A
    $1/4$
  • B
    $1/2$
  • C
    $-1/4$
  • D
    $-1/2$

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यदि $y=\tan ^{-1}\left(\frac{4 \sin 2 x}{\cos 2 x-6 \sin ^2 x}\right)$ है,तो $x=0$ पर $\left(\frac{d y}{d x}\right)$ का मान ज्ञात कीजिए।

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