Integrate question

[roadrunner]

I have to agree with Dr D on this one. Try this:

hand:=-(3*sin(2*x)^8-4*sin(2*x)^6)/48

nothand:=∫(cos(2*x)^3*sin(2*x)^5,x)

then simplify(hand-nothand)

returns 1/48.

trigsin isn't even involved but there is a difference of 1/48.

-road