# 部分分式方法与有限三角和的计算Partial Fraction Decompositions and to Trigonometric Sum Identities

Abstract: By partial fraction decomposition method, we prove a general summation formula on trigonometric sum, which contains several interesting trigonometric identities as special cases.

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[2] W. Chu. Partial fraction decompositions and trigonometric sum identities. Proceedings of the American Mathematical Society, 2008, 136(1): 229-237.

[3] R. Kress. Numerical Analysis: Graduate Texts in Mathematics (GTM181). Berlin-Heidelberg: Springer-Verlag, 1998.

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