Tg585°×cos1500°/sin2940°
Tg585°×cos1500°/sin2940°=tg45°×cos60°/sin60°=1·(1/2)/(√(3)/2)=4/√3=4√3/3 585:180=3 +45/180 1500/360=4+60/360 2940/360=8+60/360