- #1
SteveDC
- 39
- 0
Homework Statement
Need to integrate sin(pi*x^3)
Got to the end of a long question and this is the final step but I can't seem do it!
Homework Equations
The Attempt at a Solution
Tried substitution of u = x^3 and said dx = 1/3x^2 du but this doesn't cancel any x variable. I'm guessing I need to use some trig subsitution or something but don't know which?