convergence of $ \sum_{k=1}^\infty \sin^2(\frac 1 k)$ 
convergence of $ \sum_{k=1}^\infty \sin^2(\frac 1 k)$

How can I do this? Should I use the Ratio Test (I tried this but it started getting complicated so I stopped)? Or the Comparison test(what should I compare it to?)?

Comparison: $ \displaystyle \left(\sin \frac 1 k \right)^2 < \left( \frac 1 k \right)^2$.
