MCQ
$2 \tan ^{-1} \frac{1}{3}+\tan ^{-1} \frac{1}{7}=$
  • A
    $\tan ^{-1} \frac{44}{29}$
  • B
    $\frac{\pi}{2}$
  • C
    $0$
  • $\frac{\pi}{4}$

Answer

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

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