Open Access
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


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.


Published: Oct. 2003
First available in Project Euclid: 18 May 2005

zbMATH: 1044.33010
MathSciNet: MR2013091
Digital Object Identifier: 10.3792/pjaa.79.123

Primary: 11M06

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

Rights: Copyright © 2003 The Japan Academy

Vol.79 • No. 8 • Oct. 2003
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