Evaluate Series: sin(pi)(sq. rt. (n^2+k^2))

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Homework Statement



sigma n=1 to infinity
sin(pi)(sq. rt. (n^2 + k^2))


Homework Equations





The Attempt at a Solution

 
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Have you made any attempt at a solution? Moreover, have you typed that equation in correctly? (The sine of pi = 0, so the whole series as displayed above will be 0)!
 

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