=sin(2 . 360+90) COS(2. 360+180)+tg(360+225)ctg(5 . 360+45)+cos(180-45)sin(360+45)=
=sin90 cos180 +tg(180+45) ctg45 -cos45 sin45= 1 .(-1)+tg45 .ctg45-1/2=-1+1-1/2=1/2
=sin(2 . 360+90) COS(2. 360+180)+tg(360+225)ctg(5 . 360+45)+cos(180-45)sin(360+45)=
=sin90 cos180 +tg(180+45) ctg45 -cos45 sin45= 1 .(-1)+tg45 .ctg45-1/2=-1+1-1/2=1/2