Hipparchus

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Hipparchus Father of Trigonometry

• developed the ideas of trigonometry from its
  early form explored by the Hellenistic
  mathematicians.

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Main Concepts

• Supplementary angle theorem
• Half angle formulas
• linear interpolation (used to create chord
  function)

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Menelaus of Alexandria

• Astronomer and Mathematician
• Followed the work of Hipparchus
• Only surviving work is titled Sphaerica which
  highlights mathematical concepts such as the
  spherical triangle in relation to astronomy
• Major Contribution(s) Menelaus Theorem

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Main Concept

• Menelaus Theorem

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Claudius Ptolemy

• mathematician, astronomer, geographer,
  astrologer, and poet
• Followed the work of both Hipparchus as well as
  Menelaus
• Wrote Almagest, Geography, Quadripartitum and
  Tetrabiblos
• Major Contribution(s) Ptolemy's table of chords,
  Ptolemys theorem

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Main Concepts

• Ptolemy's table of chords
• Ptolemys Theorem

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