An important contribution by Menelaus of Alexandria was his works on geodesics.
The largest contribution Claude Ptolemy made to trigonometry was the table containing the lengths of chords in a circle. This is one of the oldest tables still used in trigonometry today.
well, nothing is for sure but it is said that Hipparchus, a Greek geographer. its kind of odd though. but they say that they have evidence of his systematic use of trigonometry. Also Menelaus and Ptolomy helped in the development of trigonometry.
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'.
Ptolemy created the earliest tables of trigonometry functions that were found. His mathematical methods have been used to solve problems in astronomy.
Thales, Democritus, Pythagoras, Aristotle, Archimedes, Euclid, Erastosthenes, Hipparchus,
Bartholomaeus Pitiscus is best known for his book called Trigonometria which was first published in Heidelburg in 1595. It consists of work on plane and spherical trigonometry. The book had the first recorded mention of the word "trigonometry".