trigonometry
noun
trig·o·nom·e·try ˌtri-gə-ˈnä-mə-trē 
: the study of the properties of triangles and trigonometric functions and of their applications
Example Sentences
Recent Examples on the Web Students can use it for trigonometry and calculus too, though there are better options on this list for more advanced courses. 
Rachel Klein, Popular Mechanics, 26 July 2022 This geometric structure is closely connected to important ideas in trigonometry, like the angle sum and difference formulas for sine and cosine, the theory of rotations of the plane, and e, the base of the natural logarithm function. Quanta Magazine, 23 Sep. 2021 This allows the software to do some basic trigonometry to calculate the range and orientation of objects in the environment. Sam Abuelsamid, Forbes, 29 Dec. 2021 Right now, for example, Theo was playing Liberate Hong Kong on his computer while in trigonometry class at the same time. Gish Jen, The New Yorker, 15 Nov. 2021 District spokesperson Diana Meza told the Riverside-Press Enterprise that the woman was teaching a trigonometry class at John W. North High School. Celina Tebor, USA TODAY, 22 Oct. 2021 District spokesperson Diana Meza told the Riverside-Press Telegram that the instructor, whose name was not released for personnel and privacy reasons, was teaching a trigonometry class at John W. North High School. Los Angeles Times, 21 Oct. 2021 These roots of unity possess a remarkably rich structure that connects to high school math like trigonometry and rotations of the plane as well as ongoing research that involves some of the great unanswered questions in modern math. Quanta Magazine, 23 Sep. 2021 The ancient Greeks invented trigonometry to study the motion of the stars. Kevin Hartnett, Wired, 20 June 2021 See More
Rachel Klein, Popular Mechanics, 26 July 2022 This geometric structure is closely connected to important ideas in trigonometry, like the angle sum and difference formulas for sine and cosine, the theory of rotations of the plane, and e, the base of the natural logarithm function. Quanta Magazine, 23 Sep. 2021 This allows the software to do some basic trigonometry to calculate the range and orientation of objects in the environment. Sam Abuelsamid, Forbes, 29 Dec. 2021 Right now, for example, Theo was playing Liberate Hong Kong on his computer while in trigonometry class at the same time. Gish Jen, The New Yorker, 15 Nov. 2021 District spokesperson Diana Meza told the Riverside-Press Enterprise that the woman was teaching a trigonometry class at John W. North High School. Celina Tebor, USA TODAY, 22 Oct. 2021 District spokesperson Diana Meza told the Riverside-Press Telegram that the instructor, whose name was not released for personnel and privacy reasons, was teaching a trigonometry class at John W. North High School. Los Angeles Times, 21 Oct. 2021 These roots of unity possess a remarkably rich structure that connects to high school math like trigonometry and rotations of the plane as well as ongoing research that involves some of the great unanswered questions in modern math. Quanta Magazine, 23 Sep. 2021 The ancient Greeks invented trigonometry to study the motion of the stars. Kevin Hartnett, Wired, 20 June 2021 See More Word History
Etymology
New Latin trigonometria, from Greek trigōnon + -metria -metry
First Known Use
1614, in the meaning defined above