sin(-930)+√3·cos(-210)+tg315=

-sin(6p-5p/6+√3*-cos(p+p/6)+tg(3p/2+45)=-sin(5p/6)+√3*-cos(p/6)-ctg(45)=-1/2+√3*-√3 /2 -1=-1/2+(-√9/2)-1=-0.5+-3/2)-1=-1/2-1.5-1=-0.5-1.5-1=-2-1=-3