This one can be a little tricky. Use integration by parts.
The integral portion becomes
Can you finish up now?.
Okay, this question is making me confused.
(i) State the derivative of sin(x^2).
I got that correct but I can't get the next part.
(ii) Find (integrate) x^3 cos (x^2) dx.
Answer: 1/2 [x^2 sin (x^2) + cos (x^2)] + C.
Thanks in advance if you could help!