1. The problem statement, all variables and given/known data *The sum from n = 1 to infinity* (cos(n*pi))^2/n*pi where n is the variable. 2. Relevant equations All forms of convergence tests (i.e. Ratio Test, Integral Test, Alternating Series test etc.) 3. The attempt at a solution I am having trouble figuring out which route to take to tackle this question. Any help would be appreciated!