$\begin{aligned} & \text{यदि } y = \tan^{-1} \left\{ \frac{x}{1 + \sqrt{1 - x^2}} \right\} \\ & + \sin \left\{ 2 \tan^{-1} \sqrt{\frac{1 - x}{1 + x}} \right\} \text{ है, तो } \frac{dy}{dx} = \end{aligned}$

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

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