www.mathwords.com/index_**trig**.htm

Trig Functions: Trig Identities. Trig Values of Special Angles. Trigonometry. Unit Circle. Unit Circle Trig Definitions. Wavelength : this page updated 19-jul-17 Mathwords: Terms and Formulas from Algebra I to Calculus written, illustrated, and webmastered by Bruce Simmons

**en.wikipedia.org**/wiki/**Trigonometric**_**functions**

The oldest definitions of trigonometric functions, related to right-angle triangles, define them only for acute angles. For extending these definitions to functions whose domain is the whole projectively extended real line, one can use geometrical definitions using the standard unit circle (a circle with radius 1 unit).

**www.sparknotes.com**/math/**trigonometry/trigonometricfunctions/terms**

Definitions of the important terms you need to know about in order to understand Trigonometry: Trigonometric Functions, including Domain , Function , Period , Periodic Function , Range , Reference Angle , Rule , Trigonometric Functions , Unit Circle

www.dictionary.com/browse/**trigonometry**

Trigonometry definition, the branch of mathematics that deals with the relations between the sides and angles of plane or spherical triangles, and the calculations based on them. See more.

www.vocabulary.com/lists/29512

A vocabulary list featuring Trig terms. ... These ratios are given by the following trigonometric functions of the known angle A, where a, b and c refer to the lengths of the sides in the accompanying figure: * The sine function (sin), defined as the ratio of the side opposite the angle to the hypotenuse.

**en.wikipedia.org**/wiki/**Trigonometry**

Trigonometry is the foundation of all applied geometry, including geodesy, surveying, celestial mechanics, solid mechanics, navigation. Trigonometric functions have been extended as functions of a real or complex variable, which are today pervasive in all mathematics.

**www.britannica.com**/science/**trigonometry**

Trigonometry in the modern sense began with the Greeks. Hipparchus (c. 190–120 bce) was the first to construct a table of values for a trigonometric function.He considered every triangle—planar or spherical—as being inscribed in a circle, so that each side becomes a chord (that is, a straight line that connects two points on a curve or surface, as shown by the inscribed triangle ABC in ...

**www.thefreedictionary.com**/**trigonometry**

In the deconstruction of the California state standards for trigonometry, linear algebra and mathematical analysis for the Cal-PASS (California Partnership for Achieving Student Success) Content Standards Deconstruction projects, it became apparent that terms were used for which no definition was given.

www.mrxmentorofmathematics.com/math_glossary/**trigonometry**

Mr. X takes the mystery out of trigonometry by providing an extensive video library of trigonometry glossary terms. The trigonometry glossary complements our library of trigonometry video lessons and sample trigonometry problems solved step by step in each video

**www.merriam-webster.com**/dictionary/**trigonometry**

Trigonometry definition is - the study of the properties of triangles and trigonometric functions and of their applications.