cos (360+480)-sin (360+300)+tg(360+765)=cos480-sin300+tg 765=cos (360+120)-sin(360-60)+tg (360+405)=cos120+sin60+tg405=cos (90+30)+sin(90-30)+tg(360+45)=-sin30+cos30+tg45=
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cos (360+480)-sin (360+300)+tg(360+765)=cos480-sin300+tg 765=cos (360+120)-sin(360-60)+tg (360+405)=cos120+sin60+tg405=cos (90+30)+sin(90-30)+tg(360+45)=-sin30+cos30+tg45=