cos 4455° - cos (-945°) + tg 1035° - ctg (-1500°).
cos(90+45) - cos(180-45)+tg(90+45)+ctg 60
-sin45+cos45-ctg45 +ctg60
-√2/2 + √2/2 - 1+ √3/3
=-1+√3/3= -3+√3/3
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cos(90+45) - cos(180-45)+tg(90+45)+ctg 60
-sin45+cos45-ctg45 +ctg60
-√2/2 + √2/2 - 1+ √3/3
=-1+√3/3= -3+√3/3