Funções trigonométricas matriciais

Abstract

In this work we will discuss the trigonometric functions of real numbers, com- plex numbers and square matrices. The conventional way of learning in the middle school, where only trigonometric functions of real numbers are stu- died, is to use the Euler function to define the sine and cosine. In this disser- tation, we will use some of the series theory to arrive at a approach that can be used to define the trigonometric functions of complex numbers or even square matrices. We will present some important properties of these functions and methods for their calculations, which in the matrix case use linear algebra to- ols like the canonical form of Jordan.