If ^ -1 3+ ^ -1 x= ^ -1 8, then x = - Vidyadip

MCQ

If $\tan^{-1}3+\tan^{-1}\text{x}=\tan^{-1}8,$ then $x =$

A
$5$
✓
$\frac{1}{5}$
C
$\frac{5}{14}$
D
$\frac{14}{5}$

✓

Answer

Correct option: B.

$\frac{1}{5}$

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