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k-0-2n-cos-2n-kpi-2n-

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Question Number 176806 by Brahimmekkaoui last updated on 26/Sep/22
Σ_(k=0) ^(2n) cos^(2n) (θ+((kπ)/(2n)))
$$\underset{{k}=\mathrm{0}} {\overset{\mathrm{2}{n}} {\sum}}{cos}^{\mathrm{2}{n}} \left(\theta+\frac{{k}\pi}{\mathrm{2}{n}}\right) \\ $$

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