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Evaluate:

[tex]\sum_{k=1}^{\ 6}\ f(xk)[/tex]

where

[tex]\ xk\ = \ k/2[/tex]

and

[tex]\ f(x)=sin\pi\ x[/tex]

OK,

does this mean that that I should form a RiemannSum with;

[tex]sin\pi\ (k/2)* delt(k/2)= \sum_{k=1}^{\ 6}f(k/2)delt(k/2) [/tex]

Im confused.

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# Integral evaluation.

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