## What is Trigonometry

Trigonometry is an area of **math** who studies the **relations** that have each of the elements of a **right triangle**that is, a triangle with one of its sides measuring 90 degrees or 90º.

Trigonometry already existed more than 3000 years ago, when the Babylonians and Egyptians used the **angles of triangles** to build pyramids and other complex architectural structures up to modern technology.

The **stars from the sky** inspired us to go even deeper into trigonometry to discover its “secrets” by creating **star maps** to calculate routes, prediction of weather and space phenomena, clocks, calendars, etc.

The sine function of trigonometry was already worked on by the **Arab astronomers of the 8th century**. Two centuries later they had already completed 6 functions and demonstrated the fundamental theorems of trigonometry.

Trigonometry became an independent branch of Mathematics when the current reached Europe and separated it from Astronomy.

In the 17th century, Isaac Newton discovered the series for sin x and other similar series for cos x and tangent (tan or tg)

## Basic Trigonometry

The 3 basic functions that must be considered to understand trigonometry are: the **sine of x (sin x)**he

**cosine of x (cos**and the

*x*)**tangent of x (tan**. In this case we will exemplify the

*x*or tg*x*)**angle as alpha (α)**:

Trigonometry comes from the composition of the Greek word *trigons* What does triangle mean and the word *meters* which means measurement, measurement.

**See also:**