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Trigonometry — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Trigonometry
License (as archived): CC-BY-SA-4.0
Archived: 2026-10-07T14:06:01.883Z
SHA-256 of the archived text: 24091432d6121343a782940ccd27b21ca66c7c11a7c00d94c3e86504bbe2c1c8
Stable URL of this page: https://metraipolis.com/documento/dc_da2c325fa993

How to cite

Trigonometry — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Trigonometry (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_da2c325fa993 (Metraipolis archive dc_da2c325fa993, sha256 24091432d6121343a782940ccd27b21ca66c7c11a7c00d94c3e86504bbe2c1c8)

BibTeX

@misc{dcda2c325fa993,
  title = {Trigonometry — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Trigonometry},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_da2c325fa993; sha256 24091432d6121343a782940ccd27b21ca66c7c11a7c00d94c3e86504bbe2c1c8},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/Trigonometry. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

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. In particular, the trigonometric functions relate the angles of a right triangle with ratios of its side lengths. The field emerged in the Hellenistic world during the 3rd century BC from applications of geometry to astronomical studies. The Greeks focused on the calculation of chords, while mathematicians in India created the earliest-known tables of values for trigonometric ratios (also called trigonometric functions) such as sine. Throughout history, trigonometry has been applied in areas such as geodesy, surveying, celestial mechanics, and navigation. Trigonometry is known for its many identities. These trigonometric identities are commonly used for rewriting trigonometrical expressions with the aim to simplify an expression, to find a more useful form of an expression, or to solve an equation.

Tema degli esploratori: storia e filosofia della scienza (deposito sistematico; ricerca «history of mathematics»).
Fonte: Wikipedia in inglese, voce «Trigonometry» — https://en.wikipedia.org/wiki/Trigonometry
Wikidata Q8084 (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q8084
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Trigonometry?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1375353235, consultata il 2026-10-07T14:01:52.188Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 46d911b2f293a547851afa1cbc8f592fbf23ef38d214c0e321a5d8ecc58af54b