Question

3 cos 60° - 4 cós 90° - 60 cos 210°

Answer 1

3.cos 60 - 4.cos 90 - 60.cos 210
3(1/2)-4(0)-60(-\/3/2)
3(0,5)-4(0)-60(-0,86)
1,5-0+51,60
1,5+51,60
66,66