$\cot ^{-1}\left(\frac{-1}{\sqrt{3}}\right)$ का मुख्य मान है

  • A
    $\frac{2 \pi}{3}$
  • B
    $\frac{\pi}{3}$
  • C
    $\frac{-\pi}{3}$
  • D
    $\frac{\pi}{6}$

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