$\lim _{x \rightarrow 0} \frac{x \tan 2x - 2x \tan x}{(1 - \cos 2x)^2}$ का मान है

  • A
    $2$
  • B
    $-2$
  • C
    $\frac{1}{2}$
  • D
    $-\frac{1}{2}$

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