# Trigonometry (3)

Geometry Level 2

Triangle $$ABC$$ is such that $$\tan \dfrac{A}{2}$$, $$\tan \dfrac{B}{2}$$, $$\tan \dfrac{C}{2}$$ are in harmonic progression, then find the minimum value of $$\cot \dfrac{B}{2}$$ to 3 decimal places.

×