MCQ
$2 \cot ^{-1} 3+\cot ^{-1} 7=$
  • A
    $\frac{\pi}{2}$
  • $\frac{\pi}{4}$
  • C
    $\pi$
  • D
    $\frac{\pi}{6}$

Answer

Correct option: B.
$\frac{\pi}{4}$
(B)

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