trigonometry
trigonometry[ˌtrɪgəˈnɒmɪtri]noun- [mass noun]the branch of mathematics dealing with the relations of the sides and angles of triangles and with the relevant functions of any angles
三角学
派生trigonometric[-nəˈmɛtrɪk]adjectivetrigonometricaladjective语源- early 17th cent.: from modern Latin trigonometria (see trigon, -metry)
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