$\tan \left(2 \tan ^{-1} \frac{1}{5}+\sec ^{-1} \frac{\sqrt{5}}{2}+2 \tan ^{-1} \frac{1}{8}\right)$ is equal to :

Question

$\frac{1}{4}$

$\frac{5}{4}$

Please login to view the detailed solution steps...