Question

∫cos 2 3xdx solution ​

Answer 1

Answer:

1/2(1/6sin6x+x)+c

Step-by-step explanation:

int( cos3x)^2dx

int 1/2(cos6x+1)dx

1/2 int cos6x+1dx

1/2(1/6sin6x+x)+c hope you understood this ☺️