Recent content by emanuele.levi

thank you for the hint Russell, but that's not a solution to my problem, as I want to write the quantity Cosh(x)*Cosh(y) ONLY in function of k. If I did like you suggested me, I find terms like Sinh(x)+Sinh(y) and I can't find a way to write them in function of k.

Given the quantity Cosh(x)*Cosh(y) where x and y are two indipendent real variables is it possible to write it only in function of k=Cosech(x)*Cosech(y) ? It could seem a quite easy problem but I spent a few days between the proprieties of hyperbolic functions and I really...