The Arabs invented the modern math of trigonometry. They used Ancient Greek proofs (such as those made by Pythagoras and Demosthenes) to discover that the relationships between the lengths of sides of a right angle triangle were consistent when the angles were consistent. They proved methods to derive the proper value relationships, resulting in the trigonometry tables that have now been plugged into in every scientific calculator.
hipparchus
He defined the spherical triangle
There is no Contribution of Thales in the field of trignometry.........
The contributions of Arab scholars was trigonometry. They also contributed other thing such as their intelligence . :D :)
An important contribution by Menelaus of Alexandria was his works on geodesics.
nothing
hipparchus
He defined the spherical triangle
He introduced coordinated geometry
There is no Contribution of Thales in the field of trignometry.........
The contributions of Arab scholars was trigonometry. They also contributed other thing such as their intelligence . :D :)
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.
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".