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Aristarchus's inequality (after the Greek astronomer and mathematician Aristarchus of Samos; c. 310 – c. 230 BCE) is a law of trigonometry which states that if α and β are acute angles (i.e. between 0 and a right angle) and β < α then Ptolemy used the first of these inequalities while constructing his table of chords.

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  • Aristarchus's inequality (after the Greek astronomer and mathematician Aristarchus of Samos; c. 310 – c. 230 BCE) is a law of trigonometry which states that if α and β are acute angles (i.e. between 0 and a right angle) and β < α then Ptolemy used the first of these inequalities while constructing his table of chords. (en)
  • A Desigualdade de Aristarco é uma lei da trigonometria que afirma que se α e β são ângulos agudos (ou seja, entre 0 e um ângulo reto) e "β < α" então Essa lei leva esse nome em homenagem ao matemático grego Aristarco de Samos, que fez tal afirmação. Ptolomeu usou a primeira dessas desigualdades ao construir sua tabela de acordes. (pt)
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  • Aristarchus's inequality (after the Greek astronomer and mathematician Aristarchus of Samos; c. 310 – c. 230 BCE) is a law of trigonometry which states that if α and β are acute angles (i.e. between 0 and a right angle) and β < α then Ptolemy used the first of these inequalities while constructing his table of chords. (en)
  • A Desigualdade de Aristarco é uma lei da trigonometria que afirma que se α e β são ângulos agudos (ou seja, entre 0 e um ângulo reto) e "β < α" então Essa lei leva esse nome em homenagem ao matemático grego Aristarco de Samos, que fez tal afirmação. Ptolomeu usou a primeira dessas desigualdades ao construir sua tabela de acordes. (pt)
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  • Aristarchus's inequality (en)
  • Desigualdade de Aristarco (pt)
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