Rezolvarea triunghiului dreptunghic

$\boxed{\begin{array}{cccc}& 30°& 45°& 60°\\ sin& \frac{1}{2}& \frac{\sqrt{2}}{2}& \frac{\sqrt{3}}{2}\\ cos& \frac{\sqrt{3}}{2}& \frac{\sqrt{2}}{2}& \frac{1}{2}\\ tg& \frac{\sqrt{3}}{3}& 1& \sqrt{3}\\ ctg& \sqrt{3}& 1& \frac{\sqrt{3}}{3}\end{array}}$