Answer:
Step-by-step explanation:
By definition, cos(pi/6) = adjacent side / hypothesis
On a unity circle, at the point (sqrt(3)/2, 1/2), the adjacent side is sqrt(3)/2 and the hypothesis is 1 (as it is a unity circle.)
So cos(π/6) = (sqrt(3)/2) / 1
= [tex]\sqrt{3} /2[/tex]
