How did you get to your result? Please try to show some work. Also, you will have to use the reduction formula for integration. Read this. It might help.
hi i am running into trouble using trig subsitution in this particular problem so far the farthest that i have got to is
1/8 times the intergral of 5/2 - 1/2cos(2x)+ 3/4cos(4x)+ 1/2 cos(4x)cos(2x)
i really appreacated the help and thank you