$\cot ^{-1}(-\sqrt{3})-\tan ^{-1} \sqrt{3}$ का मान . . . . . . के बराबर है।

  • A
    $0$
  • B
    $\frac{-\pi}{2}$
  • C
    $\frac{\pi}{2}$
  • D
    $\pi$

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