Question

cos630 - sin1470 - ctg1125=?

Answer 1

cos630-sin1470-ctg 1125 = cos (720 - 630) - sin (1440 - 1470) - ctg (1080 - 1125) = cos 90 - sin 30 + ctg 45 = 1/2 + 1 = 1,5

Answer 2

cos(720-90)-sin(360*4+30)-ctg(180*6+45)=cos90-sin30-ctg45=0-0.5-1=-1.5