Is the series of sin(nx)/n^2 continuous on R?

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Homework Statement



Show that \Sigma (from n=1 to infinity) of sin(nx)/n^2
is continuous on R

Homework Equations





The Attempt at a Solution


No idea, any help would be greatly appreciated.
 
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Well, that would depend on what you're allowed to use. But uniform convergence of the series pretty much implies it immediately. And showing uniform convergence is easy.

Otherwise, I imagine it's a bit trickier, and I'd have to think about it.
 
I am allowed to use uniform convergence. Thanks!
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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