$\mathop {\lim }\limits_{x \to 0} \frac{{\sqrt {\frac{1}{2}(1 - \cos 2x)} }}{x} = $

  • A
    $1$
  • B
    $-1$
  • C
    $0$
  • D
    $\text{अस्तित्व में नहीं है}$

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