√3sin(-360-120)+√2cos(360+135)-tg(-1080-30)+ctg(1440-45)=
=√3*(-sin120)+√2*cos135+tg30-ctg45=
=-√3sin(180-60)+√2cos(180-45)+tg30-ctg45=
=-√3sin60-√2cos45+tg30-ctg45=-√3*√3/2-√2*√2/2+√3/3-1=
=-3/2-1+√3/3-1=-3,5+√3/3
36cos93/cos87=36cos(90+3)/cos(90-3)=-36sin3/sin3=-36