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.
When an ancient Greek asked if an object could be subdivided indefinitely, some said yes and some said no. Neither side had any physical evidence for their point of view, nor did they seek any. The only contribution to modern science, apart from the question itself, was the word atomos (indivisible) that Democritus used in the debate. John Dalton made a contribution of a quite different order. He said that matter did consist of atoms; he said that all atoms of the same element were identical atoms with the same mass. He cited physical (that includes chemical) evidence to support his assertions. Dalton said more about atoms, but all based on evidence, rather than opinion. Democritus's theory was philosophy. Dalton's was science as we understand it today.
Thales, Democritus, Pythagoras, Aristotle, Archimedes, Euclid, Erastosthenes, Hipparchus,
hipparchus
nothing
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.