Dictionary

trigonometry

noun trig·o·nom·e·try \ˌtri-gə-ˈnä-mə-trē\

: a branch of mathematics that deals with relationships between the sides and angles of triangles

Full Definition of TRIGONOMETRY

:  the study of the properties of triangles and trigonometric functions and of their applications
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Origin of TRIGONOMETRY

New Latin trigonometria, from Greek trigōnon + -metria -metry
First Known Use: 1614

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