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Home › Science › Mathematics › Mathematicians › O

O

Nicole d’Oresme (ca. 1320 – 1382)

  • Born in France.
  • He introduced a mathematical methodology which eventually developed into analytical geometry.
  • He suggested the possibility of irrational proportion.
William Oughtred (1575-1660)

  • Born in England.
  • He introduced the symbol x for multiplication and the symbol of : : in proportion.
  • He introduced the abbreviations for such tems as sine, cosine, tangent, cotangent, secant, and cosecant.




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