फलन $f(x) = \sqrt{\cos^{-1}\left(\frac{1-|x|}{2}\right)}$ का प्रांत (domain) है

  • A
    $(-3, 3)$
  • B
    $[-3, 3]$
  • C
    $(-\infty, -3) \cup (3, \infty)$
  • D
    $(-\infty, -3] \cup [3, \infty)$

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