Some identities on degenerate trigonometric functions

Authors

  • Taekyun Kim Department of Mathematics, Kwangwoon University, Seoul 139-701, Republic of Korea
  • Dae San Kim Department of Mathematics, Sogang University, Seoul 121-742, Republic of Korea
https://doi.org/10.15330/cmp.17.2.369-375

Keywords:

degenerate tangent function, degenerate cotangent function, degenerate sine function, degenerate cosine function
Published online: 2025-07-05

Abstract

In this paper, we study several degenerate trigonometric functions, which are degenerate versions of the ordinary trigonometric functions, and derive some identities among such functions by using elementary methods. Especially, we obtain multiple-angle formulas for the degenerate cotangent and degenerate sine functions.

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How to Cite
(1)
Kim, T.; Kim, D. S. Some Identities on Degenerate Trigonometric Functions. Carpathian Math. Publ. 2025, 17, 369-375.