Roots of sine and cosine functions

Authors

  • Eduardo Degiorgio UNL. Alumno de la Escuela Industrial Superior
  • Guillermo Farías UNL. Alumno de la Escuela Industrial Superior

DOI:

https://doi.org/10.33044/revem.41056

Keywords:

Roots of a function, Sine, Cosine

Abstract

The aim of this work is to obtain a general formula for the roots of functions of the type

f(x) = k sin(a(x − c)) + b, g(x) = k cos(a(x − c)) + b,

for differents values of a, b, c and k. We start finding, for each one of the given functions, a root xR and the abscise xM of a maximum point which is adjacent of xR. From the distance between these two values and the period of the function, all the other roots are determined.

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References

Tignol, J.-P. (2016). Galois’ theory of algebraic equations (Second ed.). World Scientific Publishing Co. Pte. Ltd., Hackensack, NJ.

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Published

2023-04-27

Issue

Section

Artículos de Matemática

How to Cite

[1]
Degiorgio, E. and Farías, G. 2023. Roots of sine and cosine functions. Revista de Educación Matemática. 38, 1 (Apr. 2023), 43–52. DOI:https://doi.org/10.33044/revem.41056.