trigonometry

FREQ #43335

n. 三角学

发音

其它 /ˌtɹɪɡəˈnɒmətɹi/

词形变化

trigonometries 复数 trigonometries

别名

trig.

释义与例句

n.
  1. 1.

    The branch of mathematics that deals with the relationships between the sides and angles of (in particular) right-angled triangles, as represented by the trigonometric functions, and with calculations based on said relationships.

    三角法

    三角学

    可数 不可数 数学

    Trigonometry emerged in the Hellenistic world during the 3rd century BCE from applications of geometry to astronomy; the Greeks focused on the calculation of chords, while mathematicians in India created the earliest known tables of values for trigonometric functions such as sine.

    Historically, trigonometry has been applied in areas such as geodesy, surveying, celestial mechanics and navigation.

词汇关系

名词

同义词 1

trig

上位词 1

pure mathematics

下位词 1

triangulation

词源

PIE word *tréyes From 1610s, from New Latin trigōnometria, from Ancient Greek τρίγωνον (trígōnon, “triangle”) + μέτρον (métron, “measure”), equivalent to trigono- + -metry.

来源：wiktionary