On the trigonometric subtraction and addition formulas

DOI10.1007/PL00000130zbMath0993.39023OpenAlexW2087686222MaRDI QIDQ1972861

Thomas A. Poulsen, Henrik Stetkaer

Publication date: 26 April 2000

Published in: Aequationes Mathematicae (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/pl00000130

zbMATH Keywords

functional equationaddition formulainvolutive group automorphismsubtraction formulatrigonometric addition and subtraction

Mathematics Subject Classification ID

Functional equations for functions with more general domains and/or ranges (39B52)

Related Items (8)

Unnamed Item ⋮ The cosine-sine functional equation on a semigroup with an involutive automorphism ⋮ A generalization of the cosine addition law on semigroups ⋮ A Class of Functional Equations of Type d’Alembert on Monoids ⋮ The integral sine addition law ⋮ Stability of the Cosine–Sine Functional Equation on Amenable Groups ⋮ The integral cosine addition and sine subtraction laws ⋮ Trigonometric identities in *-algebras

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