Related Post: 4 Cos 2 X 3 0 4 Cos 2 Theta 3 0 4cos 2 X )- 3 0 4 Cos2 X 4 Cos X 3 0 4 Cos 3 X 3 Sin X − π 2 0 3 3/4 * 4 2/3 3 Times 3 Over 4 2/3c X 4 3 1/2 Times 4 2/3