Тангес Пи/4 - cos^2 пи/6

Question

Тангес Пи/4 - cos^2 пи/6

Answer 1

Tgpi/4-cos^2pi/6=1-cos^2 pi/6=1- ((1+cos2× pi/6)/2)=1- ((1+cos pi/3)/2)=1-(1+1/2)/2=1-3/4=1/4