the branch of mathematics that deals with the relations between the sides and angles of plane or spherical triangles, and the calculations based on them.
Origin: 1605–15; < Neo-Latintrigōnometria; see trigon, -o-, -metry
trig the branch of mathematics concerned with the properties of trigonometric functions and their application to the determination of the angles and sides of triangles. Used in surveying, navigation, etc
[C17: from New Latin trigōnometria from Greek trigōnon triangle]
trigonometric
—adj
trigono'metrical
—adj
trigono'metrically
—adv
trigonometry (ˌtrɪɡəˈnɒmɪtrɪ)
—n
trig the branch of mathematics concerned with the properties of trigonometric functions and their application to the determination of the angles and sides of triangles. Used in surveying, navigation, etc
[C17: from New Latin trigōnometria from Greek trigōnon triangle]
"branch of mathematics that deals with relations between sides and angles of triangles," 1614, from Mod.L. trigonometria (Barthelemi Pitiscus, 1595), from Gk. trigonon "triangle" (from tri- "three" + gonia "angle;" see knee) + metron "a measure" (see meter (2)).