જો $y = \tan^{-1} \left( \frac{\sqrt{1+x^2}-1}{x} \right)$ હોય, તો $y'(1)$ ની કિંમત શોધો.

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

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જો $y = \cot^{-1}(\cos 2x)^{1/2}$ હોય,તો $x = \frac{\pi}{6}$ આગળ $\frac{dy}{dx}$ ની કિંમત શોધો.

જો $0 < |x| < 1$ માટે $f(x) = \operatorname{Tan}^{-1} \left[ \frac{\sqrt{1+x^2} + \sqrt{1-x^2}}{\sqrt{1+x^2} - \sqrt{1-x^2}} \right]$ હોય,તો $f'(x) =$

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