Trigonometric Sums via Lagrange Interpolation
By means of the Lagrange interpolation, we derive two trigonometric identities that are utilized to evaluate, in closed forms, eight classes of power sums of trigonometric functions over equally distributed angles around the unit circle. When the <i>m</i>th term is removed from the sums, four classe...
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2025-09-01
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| Mynediad Ar-lein: | https://www.mdpi.com/2075-1680/14/10/724 |
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