Hi
looks like . Hence, you may try substituting , it should give something easier to evaluate.
I'm searching information about elliptic integrals of second kind. That would make sense as the integral arose when I was trying to calculate the arc length of a curve generated when a point is moving along the surface of a sphere, with determined polar and azimuthal angular speed (both constants).
flyingsquirrel I also tried that variable change at the beggining (i thought the same thing), but i didn't reach anything.
Thanks for your answers.