How would I use the direct comparison test to determine whether ornot the series converges: \sum_{n=1}^{infinity}\frac{3-cos(n)}{n^2} . What series...

How would I use. What series should I compare this series to.

Compare it with the series with the general term 4in"2. We have *1 S cos(n) S 1 for all n. 80 2 S 3 *1 S 3 ~ 003(n) S 3 * (HI) : 4. Finally 3 cos(n)n2 5419' the series 12;; :4 231% is...