# Another integral

1. Sep 27, 2011

### 1MileCrash

Find the integral of

X^3sin(x^2)

No useful substitutions I can find, integration by parts gets chaotic.

2. Sep 27, 2011

### LCKurtz

Write it as x(x2)sin(x2) and begin with substitution u = x2.

3. Sep 27, 2011

### 1MileCrash

Got the answer. Thank you.

I wish I were able to recognize these things more quickly.

4. Sep 27, 2011

### SammyS

Staff Emeritus
Practice, practice, practice ...