Trigonometry is a branch of mathematics that deals with the study of triangles and the relationships between the sides and angles of triangles. The word "trigonometry" comes from the Greek words "trigonon," which means "triangle," and "metron," which means "measure."

Trigonometry has a long history, with its origins dating back to ancient civilizations such as the Egyptians, Babylonians, and Indians. These early cultures used trigonometry for practical purposes such as surveying land and constructing buildings.

The first known work on trigonometry was done by the ancient Greek mathematician Hipparchus, who lived in the 2nd century BC. Hipparchus developed a system of trigonometry that was based on the concept of chords, which are segments within a circle that connect two points on the circumference of the circle.

In the 3rd century AD, the Greek mathematician Ptolemy wrote a treatise on trigonometry called the "Almagest," which was a comprehensive guide to the field. The "Almagest" was influential for centuries and was used by many other mathematicians and astronomers.

During the Middle Ages, trigonometry was further developed by Islamic mathematicians such as Abu Kamil and Muhammad ibn Musa al-Khwarizmi. These mathematicians made significant contributions to the field, including the development of trigonometric functions and the use of trigonometry in celestial navigation.

Trigonometry continued to evolve over the centuries, and in the 16th and 17th centuries, European mathematicians such as John Napier and Isaac Newton made significant contributions to the field. In the 19th and 20th centuries, trigonometry was further developed and refined, leading to the modern version of the subject that we know today.

In summary, the word "trigonometry" has its roots in the Greek language and refers to the study of triangles and the relationships between the sides and angles of triangles. Trigonometry has a long history, with its origins dating back to ancient civilizations and has been developed and refined over the centuries by a variety of mathematicians and astronomers.

## History of trigonometry

The term "trigonometry" derives from the Greek "" "trigonometria" , meaning "triangle measuring", from "" triangle. Trigonometry Essentials Practice Workbook with Answers comes from a series of books that Chris McMullen developed entitled, Improve Your Math Fluency. The origin of the units of measurement of angles degrees , connected with the studies of the scientists of Ancient Babylon, is based on the sixty-tier system of calculus, which gave rise to the modern decimal used in many applied sciences. Running Head: History of Trigonometry History of Trigonometry Rome Fiedler History of Mathematics 501 University of Akron April 29, 2012 History of Trigonometry: An Introduction. Racism is objectively defined as any practice of ethnic discrimination or segregation. The Crest of the Peacock: Non-European Roots of Mathematics 2nded. New York:Dover Publications, Inc.

## Origins of the Names of Trigonometric Functions

With this in mind, the identity upon which trigonometry is based turns out to be the Pythagorean Theorem. Even after it was developed, it wasn't considered math, but merely a calculational tool, like log tables. Born in Basel Switzerland, later moved to neighboring town, Riehen, Euler attended a rather poor school that taught no mathematics. Ptolemy's theorem leads to the equivalent of the four sum-and-difference formulas for sine and cosine that are today known as Ptolemy's formulas, although Ptolemy himself used chords instead of sine and cosine. The History of Trigonometry is one type of mathematics that deals with the sides and the angles. The six trigonometric ratios are sine, cosine, tangent, cotangent, secant, and cosecant.