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Question Number 29847 by abdo imad last updated on 12/Feb/18
θ∈]0,π[findhevaluesof∑n=1∞1ncos(nθ)and∑n=1∞1nsin(nθ).
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![θ ∈]0,π[ find he values of Σ_(n=1) ^∞ (1/n)cos(nθ) and Σ_(n=1) ^∞ (1/n)sin(nθ) .](Q29847.png)