trig·​o·​nom·​e·​try | \ ˌtri-gə-ˈnä-mə-trē How to pronounce trigonometry (audio) \

Definition of trigonometry

: the study of the properties of triangles and trigonometric functions and of their applications

Examples of trigonometry in a Sentence

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There are a lot more ways multiples of 60 can be divided into fractions, which makes trigonometry much easier. Avery Thompson, Popular Mechanics, "Researchers Discover Babylonian Tablet Is Ancient Trig Table," 25 Aug. 2017 The researchers believe that modern mathematics has a lot to learn from the simplicity and accuracy of Babylonian trigonometry. Avery Thompson, Popular Mechanics, "Researchers Discover Babylonian Tablet Is Ancient Trig Table," 25 Aug. 2017 Critical mathematical applications such as Fourier transforms, Riemann zeta functions, Gaussian distributions, roots of unity, integrating over polar coordinates and pretty much anything involving trigonometry employs pi. Randyn Charles Bartholomew, Scientific American, "Let's Use Tau--It's Easier Than Pi," 25 June 2014 Fans watched in physical discomfort as Bryson DeChambeau consulted his trusty yardage/topography/trigonometry map on every shot, chip and putt. Daniel Rapaport,, "FORE Questions: On Slow Play, 'Backstopping" and Offbeat U.S. Open Storylines," 11 June 2018 Game designer: Mathematics is involved in game theory, and programmers regularly utilize trigonometry, physics and calculus., "Jobs add up for students proficient in math," 19 Apr. 2018 Here’s the best-case scenario: a bad guy comes in with an AR-15, Mr. Hanabrink pauses his trigonometry lesson, pulls a .22 from under his sweater vest, calmly enters the fray, and delivers the kill shot. Dave Holmes, Esquire, "'Arm the Teachers' Is the Vain and Foolish Fantasy of a Vain and Foolish President," 23 Feb. 2018 In addition to trigonometry homework and essays on Shakespeare, American students are being tasked with an impossible request: ensure your own safety if a shooter arrives on campus. Ella Cerón, Teen Vogue, "Students Demonstrate How to Survive a School Shooting," 23 Mar. 2018 Periodic functions are repeating patterns like the undulations of a sine wave in trigonometry. Kenneth Chang, New York Times, "Robert P. Langlands Is Awarded the Abel Prize, a Top Math Honor," 20 Mar. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'trigonometry.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of trigonometry

1614, in the meaning defined above

History and Etymology for trigonometry

New Latin trigonometria, from Greek trigōnon + -metria -metry

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Statistics for trigonometry

Last Updated

1 Mar 2019

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Time Traveler for trigonometry

The first known use of trigonometry was in 1614

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More Definitions for trigonometry



English Language Learners Definition of trigonometry

: a branch of mathematics that deals with relationships between the sides and angles of triangles

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Rhyming Dictionary: Words that rhyme with trigonometry

Spanish Central: Translation of trigonometry

Nglish: Translation of trigonometry for Spanish Speakers Encyclopedia article about trigonometry

Comments on trigonometry

What made you want to look up trigonometry? Please tell us where you read or heard it (including the quote, if possible).


an enemy or opponent

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