Question: Can't solve this equation

Hello everybody,

 

I guess my problem is a very little one, but I don't have any idea how to solve the following equation:

The equation is defined as follows:

 

gl1 := a = (arctan(b^2/(z*sqrt(b^2+b^2+z^2)))+b^2*z*(1/(z^2+b^2)+1/(z^2+b^2))/sqrt(b^2+b^2+z^2))/(2*pi);
                                       
z := solve(gl1, z);

Warning, solutions may have been lost

Does anybody of you have an idea how to solve this problem?

 

Thanks so much in advance!

Please Wait...