Question

How do I find the integration of sin (pix^3)dx?

Answer 1

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

Answer 2

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.

Answer 3

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

Answer 4

http://www.wolframalpha.com/input/?i=integral+sin+%28pix^3%29dx

Answer 5

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