In another thread, someone was asking a question which involved solving this equation for x:
How would one go about tackling something like that? Can it even be done?
I'm not asking about this equation specifically. Wikipedia has a few helpful identities, but nothing which I can use to solve the above equation for x.
Such equations usually do not have simple solutions, but there is a little trick that can be employed to find them even if you can't by manipulating the equations. If you calculate the solution numerically to high precision you can feed it into the inverse symbolic calculator to see if it can identify probable forms for the solution, then test them to see if they are in fact exact solutions to the equations.
In this case using a solution correct to 15 digits turns up no candidates on ISC.