Additional Math – Trigonometry – Solve cotangent half angle – 2cosine half angle = 2

$latex \displaystyle \cot \left( {\frac{x}{2}} \right)-2\cos \left( {\frac{x}{2}} \right)=0$ Convert cotangent into cosine divided by sine. $latex \displaystyle \frac{{\cos \left( [...]