- #1
Petar Mali
- 290
- 0
Homework Statement
I need to calculate integral
[tex]
\int^{\frac{2\pi}{a}}_{0}\int^{\frac{2\pi}{a}}_{0} \int^{\frac{2\pi}{a}}_{0}\frac{1}{\sqrt{1-\frac{(cosxa+cosya+cosza)^2}{9}}}ctgh(\frac{6SJ\sq rt{1-\frac{(cosxa+cosya+cosza)^2}{9}}}{2T})dxdydz
[/tex]
[tex]a,S,J[/tex] are constants different then 0 .
Homework Equations
The Attempt at a Solution
[tex]N[\int^{\frac{2\pi}{a}}_{0}\int^{\frac{2\pi}{a}}_{0}\int^{\frac{2\pi}{a}}_{0}\frac{Coth[\frac{6SJ\sqrt{1-\frac{(Cos[x a]+Cos[y a]+Cos[z a])^2}{9}}}{2T}]}{\sqrt{1-\frac{(Cos[x a]+Cos[y a]+Cos[z a])^2}{9}}}dxdydz][/tex]
I try also to define a>0 but Mathematica don't give a result. Where is a problem? How can I dodefine this? Thanks for your answer.