Question 53
Find the exact value of $\tan^{-1}\left(\frac{1}{2}\right) + \tan^{-1}\left(\frac{1}{5}\right) + \tan^{-1}\left(\frac{1}{8}\right)$.
MathNet 2016-part-03 — 184 problems (EN–VI) Question 53
Math Olympiad Vault · MathNet 2016-part-03 — 184 problems (EN–VI)