"Trigonometry (from Greek trigōnon "triangle" + metron "measure") is a branch of mathematics that studies triangles and the relationships between their sides and the angles between these sides. Trigonometry defines the trigonometric functions, which describe those relationships and have applicability to cyclical phenomena, such as waves. The field evolved during the third century BC as a branch of geometry used extensively for astronomical studies. It is also the foundation of the practical art of surveying.
Trigonometry is the branch of mathematics concerned with the measurements of the parts, side, and angles of a triangle. Plane Trigonometry, which is the topic covered of this blog, is restricted to triangles lying on a plane*. As a consequence, a considerable portion of the subject matter is concerned with a study of the properties of and relations among the trigonometric functions.
In short Trigonometry is all about TRIANGLE, the study of how
the sides and angles of a triangle are related to each other.
* a flat, two-dimensional surface
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