Ptolemy's table of chords (Q7257100)

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2nd century CE trigonometric table

• table of chords

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Language	Label	Description	Also known as
English	Ptolemy's table of chords	2nd century CE trigonometric table	table of chords

Statements

instance of

mathematical concept

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subclass of

trigonometric table

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defining formula

${\displaystyle \operatorname {chord} \theta =120\,\sin \left({\frac {\theta ^{\circ }}{2}}\right)=60\cdot \left(2\,\sin \left({\frac {\pi \theta }{360}}{\text{ radians}}\right)\right)}$

1 reference

imported from Wikimedia project

English Wikipedia

maintained by WikiProject

WikiProject Mathematics

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Identifiers

Freebase ID

/m/0gh8jcl

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Microsoft Academic ID

46984397

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OpenAlex ID

C46984397

1 reference

stated in

OpenAlex

retrieved

26 January 2022

reference URL

https://docs.openalex.org/download-snapshot/snapshot-data-format

 

Sitelinks

Wikipedia(3 entries)

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• enwiki Ptolemy's table of chords
• eswiki Tabla de cuerdas de Ptolomeo
• zhwiki 托勒密全弦表

Wikibooks(0 entries)

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Wikinews(0 entries)

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Wikiquote(0 entries)

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Wikisource(0 entries)

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Wikiversity(0 entries)

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Wikivoyage(0 entries)

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Wiktionary(0 entries)

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Multilingual sites(0 entries)

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