1. The problem statement, all variables and given/known data The question asked was to "Show that..." with regards to the equations stated below. 2. Relevant equations sorry for such a large image... I am not too savvy with the latex yet, so i just linked an image that i created with microsoft word. 3. The attempt at a solution So, I know I am suppossed to show an attempt at this solution, but I am completely boggled on where to even start. One thing I did try to do for the first equation was to just substitute in values for n starting at 2. This did not really do much for me because as I continued along, the equation just came out to be ln(1-(some number smaller and smaller than 1)). The only thing I can take out of the second equation is that the series will converge at pi, but I don't see how that is going to help me. I also tried substitute in numbers for n but again, no help there. I did find out however that the series was an alternating series, but I guess that was pretty obvious from the original statement of the problem. Any help with getting me started with this would be greatly appreciated!!