democritus was greek philosophers.
Democritus thought that the world was composed of atoms .
Democritus achievements are his atomic theory and his book -on the little order of the world- which describes his atomic theory.
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Democritus was born in Abdera, Thrace around 460 BC and died around 370 BC.
Thales, Democritus, Pythagoras, Aristotle, Archimedes, Euclid, Erastosthenes, Hipparchus,
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hipparchus
Democritus's main contribution to physics was discovery of the atom. He devoted his life to finding out as much as possible to create what is thought to be the first atomic theory.
He defined the spherical triangle
The fungal fish recorder.
He introduced coordinated geometry
There is no Contribution of Thales in the field of trignometry.........
spherical and plane trigonometry? :p
An important contribution by Menelaus of Alexandria was his works on geodesics.
Centuries ago, Islam created the mathematics of 'Trigonometry'.
Ptolemy's major contribution to trigonometry was his work on chords in a circle, which led to the development of the trigonometric functions sine, cosine, and tangent. He compiled a table of chords that facilitated trigonometric calculations and navigational measurements. Ptolemy's work influenced the development of trigonometry in the medieval Islamic world and later in Europe.