Home›Browse›tangent half-angle formula🌐EnglishEnglishEspañolFrançaisPortuguêsTiếng ViệtРусскийالعربية中文日本語EntityQ2641564· pop 13· linked from 15 articlestangent half-angle formulaSign in to saveterm in trigonometryWikidata factsSubclass oftheoremShow 1 more factmaintained by WikiProjectWikiProject MathematicsSources (1)wikidata.orgvia Wikidata · CC0Available in 13 languagesEspañolFrançais中文РусскийPortuguêsالعربيةCatalanChuvashKazakhKhmerTiếng ViệtUkrainianvia Wikidata sitelinks · CC0