4sin180+3cos720-3sin630+5cos900=

Question

4sin180+3cos720-3sin630+5cos900=

Answer 1

4sin пи + 3 cos 4пи - 3sin (2пи + 270) + 5cos (2пи + 180) = 4*0 + 3*1+ 3*(-1) + 5*(-1) = -5