Duplication formulas in triple trigonometry

Nobushige Kurokawa; Masato Wakayama

doi:10.3792/pjaa.79.123

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Oct. 2003 Duplication formulas in triple trigonometry

Nobushige Kurokawa, Masato Wakayama

Proc. Japan Acad. Ser. A Math. Sci. 79(8): 123-127 (Oct. 2003). DOI: 10.3792/pjaa.79.123

Abstract

We study the duplication formulas of triple sine and cosine functions from various expressions point of view.

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Nobushige Kurokawa. Masato Wakayama. "Duplication formulas in triple trigonometry." Proc. Japan Acad. Ser. A Math. Sci. 79 (8) 123 - 127, Oct. 2003. https://doi.org/10.3792/pjaa.79.123

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Published: Oct. 2003

First available in Project Euclid: 18 May 2005

zbMATH: 1044.33010

MathSciNet: MR2013091

Digital Object Identifier: 10.3792/pjaa.79.123

Subjects:

Primary: 11M06

Keywords: duplication formula , multiple trigonometric function , Riemann zeta function , special values

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Proc. Japan Acad. Ser. A Math. Sci.

Vol.79 • No. 8 • Oct. 2003

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