Trigonometric ratios of 30 degrees

Here are the exact values of the trigonometric ratios of an angle of 30 degrees

${\displaystyle \sin <!--\; \; -->30°=\frac{1}{2}}$

${\displaystyle \cos <!--\; \; -->30°=\frac{\sqrt{3}}{2}}$

${\displaystyle \tan <!--\; \; -->30°=\frac{1}{\sqrt{3}}}$

This diagram shows how they are derived using the properties of an equilateral triangle and the pythagoras theorem