फलन $\cos^{-1}\left(\frac{2 \sin^{-1}\left(\frac{1}{4x^2-1}\right)}{\pi}\right)$ का प्रांत (domain) है

  • A
    $R - \left\{-\frac{1}{2}, \frac{1}{2}\right\}$
  • B
    $(-\infty, -1] \cup [1, \infty) \cup \{0\}$
  • C
    $(-\infty, -\frac{1}{\sqrt{2}}) \cup (\frac{1}{\sqrt{2}}, \infty) \cup \{0\}$
  • D
    $(-\infty, -\frac{1}{\sqrt{2}}] \cup [\frac{1}{\sqrt{2}}, \infty) \cup \{0\}$

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