So I was going through some old tests of mine and found this problem in an old precalculus test from long ago. I of course did not get it right and I don't think anyone did. Here's the problem: Use natural logarithms to solve 2 = [e^x - e^(-x)]/2 for x. I tried every little trick I know...I have no idea how to get this. Can you believe this was asked on a test in a precalculus course (along with tons and tons of other questions)!? I don't know if this thread belongs in the homework section or not. It seems like it but this is actually not a homework assignment.