1. The problem statement, all variables and given/known data
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!
2. Relevant equations
3. 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?
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!
2. Relevant equations
3. 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?
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