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Trigonometry (from Ancient Greek τρίγωνον (trígōnon) 'triangle', and μέτρον (métron) 'measure') is a branch of mathematics concerned with relationships between angles and side lengths of triangles.
Learn the basics of trigonometry, the branch of mathematics that deals with triangles and angles. Find out how to use sine, cosine and tangent functions, the unit circle, degrees and radians, and solve triangles.
Khan Academy offers four units of trigonometry courses with 36 skills to master. You can also test your knowledge with a course challenge, a quiz, and a unit test.
Jun 17, 2024 · Learn about trigonometry, the branch of mathematics that deals with angles and their functions. Explore its origins, formulas, identities, and uses in astronomy, geometry, and more.
Learn the basics of trigonometry, the study of relationships between the sides and angles of a triangle. Find out how to define and calculate trigonometric ratios, and explore some examples and identities.