यदि $y = \operatorname{cosec}^{-1}(x)$ और $\frac{dy}{dx} = \frac{-1}{|x| \sqrt{x^2-1}}$ है,तो

  • A
    $y \in \left(-\frac{\pi}{2}, 0\right)$
  • B
    $y \in \left(-\frac{\pi}{2}, \frac{\pi}{2}\right)$
  • C
    $y \in \left(-\frac{\pi}{2}, 0\right) \cup \left(0, \frac{\pi}{2}\right)$
  • D
    $y \in \mathbb{R}$

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