trigonometry
/ˌtɹɪɡəˈnɒmətɹi/
noun1
- 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.
- 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.
forms
trigonometries