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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Today, Renee is an A+ student and is doing trigonometry and precalculus. Kristen Taketa, San Diego Union-Tribune, "Here are San Diego County’s five Teachers of the Year," 7 Sep. 2019 The plan included a variety of magnet programs, with exclusive offerings at East Side High, such as AP calculus and trigonometry. Kristina Rizga, The Atlantic, "What If Teachers Didn’t Focus So Much on Individual Achievement?," 27 June 2019 Rebuilding our manufacturing base, with its higher paying jobs, can be facilitated with an increased emphasis on trigonometry and statistics-the two types of math most used on the factory floor. San Diego Union-Tribune, "Your Say: How can we improve public education?," 14 June 2019 Twenty years ago someone who aspired to be a contractor did not need to learn trigonometry. Allison Schrager, Quartz, "How young is too young to begin preparing for a career?," 6 June 2019 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

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

27 Sep 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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More from Merriam-Webster on trigonometry

Rhyming Dictionary: Words that rhyme with trigonometry

Spanish Central: Translation of trigonometry

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

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