anonymous 5 years ago How do I find the integration of sin (pix^3)dx?

1. anonymous

use numerical analysis. evaluate definite integral by estimating area under curve

2. anonymous

I know that, but how do I integrate sin with the pix^3? It's cos something isn't it? but I forgot how to integrate.

3. anonymous

thats what i mean there is no way to integrate it using any methods (substitution, by parts...)

4. anonymous
5. anonymous

ok, well, here is the real problem: it's a double integration: $\int\limits_{0}^{9}\int\limits_{\sqrt{y}}^{3}\sin (pix^3) dxdy$