I would like to know how to prove the convergence (or not) of the following serie:
$\sum\limits_{n=1}^{\infty }(-1)^{n+1} \frac{\sin^2(n)}{n}$
Thank you in advance for any suggestion.
I would like to know how to prove the convergence (or not) of the following serie:
$\sum\limits_{n=1}^{\infty }(-1)^{n+1} \frac{\sin^2(n)}{n}$
Thank you in advance for any suggestion.