1. The problem statement, all variables and given/known data Calculate the following limit: 2. Relevant equations 3. The attempt at a solution I don't know how to proceed with this. I've tried to multiply by the conjugate, and to simplify the expression [itex](x+\pi)[/itex] to [itex]u[/itex], but I wasn't very sucessful. To what kind of algebric device I could resort to? Or is there other way to deduce the limit?