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trigonometry
trigonometry /ˌtrɪɡ.əˈnɒm.ə.tri/ aep /-ˈnɑː.mə-/ noun [U] (INFORMAL trig)
► F0 a type of mathematics that deals with the relationship between the angles and sides of triangles, used in measuring the height of buildings, mountains, etc.: » Trigonometry concerns the functions of angles, such as sine, cosine, and tangent.Thesaurus+: ↑Branches and types of mathematics |