Wikipedia has no reference of Democritus' contribution to Trig. He contributed to Atomic theory, and to Geometry. Some Geometry and Trig. topics overlap, so maybe that is what you are referring to.
Leucippus and Democritus, ancient Greek philosophers, made their contributions to atomic theory around the 5th century BCE. Leucippus is often credited with originating the concept of the atom, while Democritus expanded on these ideas and is known for developing a more comprehensive atomic theory. Their work laid the groundwork for later scientific thought regarding the nature of matter.
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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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
Centuries ago, Islam created the mathematics of 'Trigonometry'.
An important contribution by Menelaus of Alexandria was his works on geodesics.
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.