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calculate-n-1-cos-nx-n-2-and-n-1-sin-nx-n-2-




Question Number 34011 by math khazana by abdo last updated on 29/Apr/18
calculate  Σ_(n=1) ^∞  ((cos(nx))/n^2 )  and Σ_(n=1) ^∞   ((sin(nx))/n^2 )
calculaten=1cos(nx)n2andn=1sin(nx)n2

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