3cos 3660* + sin (-1560*) + cos(-450*)=3cos(360*10+60)-sin(4*360+180-60)+c0s(360+90)=
=3cos60-sin60+cos90=3*1/2 -V3/2+0 =(3-V3)/2
3cos 3660* + sin (-1560*) + cos(-450*)=3cos(360*10+60)-sin(4*360+180-60)+c0s(360+90)=
=3cos60-sin60+cos90=3*1/2 -V3/2+0 =(3-V3)/2