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I determined that the sum of the first series [itex]\sum_{n=1}^{\infty} cos(\frac{\pi}{2n}) [/itex] diverges. I could not figure out whether or not the series [itex]\sum_{n=1}^{\infty} sin(\frac{\pi}{2n})[/itex] converges or diverges. I think it diverges but I'm unsure because as n approaches infinity each term in the series approaches zero.

Any help would be much appreciated. Thank you in advance