Trigonometric Tables Are Insufficient!
Geometry
Level
4
\[ \large \tan^{2} \frac{\pi}{16} + \tan^{2} \frac{3\pi}{16} + \tan^{2} \frac{5\pi}{16} + \tan^{2} \frac{7\pi}{16} = \, ? \]
by
Tapas Mazumdar