sin240°=sin(180°+60°)=sin60°=√3/2
sin30°=1/2
sin45°=√2/2
sin60°=√3/2
cos30°=√3/2
cos45°=√2/2
cos60°=1/2
tg30°=√3
tg45°=1
tg60°=√3/3
ctg30°=√3/3
ctg45°=1
ctn60°=√3
