Question

What is the integration of(1+sin3x)^3*cos3x dx

Answer 1

I hope u got it the answer

Answer 2

1+sin3x=t
(3cos3x)dx=dt
cos3xdx=dt/3
now
integration of t^3dt/3
t^4/4*3+c
(1+sin3x)^4/12+c
i hope this will help u