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arXiv · 2210.00180

Exact evaluations and reciprocity theorems for finite trigonometric sums

Bruce C. Berndt·Sun Kim·Alexandru Zaharescu
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Abstract

We evaluate in closed form several classes of finite trigonometric sums. Two general methods are used. The first is new and involves sums of roots of unity. The second uses contour integration and extends a previous method used by two of the authors. Reciprocity theorems for certain trigonometric sums are also established.

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Bruce C. Berndt, Sun Kim, Alexandru Zaharescu. 2022-10-01. Exact evaluations and reciprocity theorems for finite trigonometric sums. https://arxiv.org/abs/2210.00180

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