Father of Trigonometry

Hipparchus

Hipparchus was born in 190 BC. He was a Greek astronomer, geographer, and a mathematician. He was most famous for his initial discovery in a precision of equinoxes. But he was most often called as father of Trigonometry.

 He was born at Nicaea, Bithynia which is currently called as Iznik, Turkey. He worked as an astronomer from 162 to 127 BC. He was considered to be a great astronomer in ancient times. Few often called him as the greatest of overall astronomers of antiquity.

His models were the first to survive the motions and quantitative models of sun and moon still exist. He did this by continuous observation and also the mathematical techniques accumulated over centuries by the Babylonians.

As we all know that he developed trigonometry and also trigonometric tables. He also has his works in spherical trigonometry. In the trigonometry, with all his solar and lunar techniques, he might be the first person to develop the most reliable method for the prediction of a solar eclipse.

Let us know about his other achievements and discoveries :

• Discovery and measurement of Earth's possession
• His most famous work was the compilation of the first comprehensive star catalog of the western world which gave a specific name in many of his works. Because from that time it won't be possible to know even about the overall galaxy.
• the invention of the astrolabe
• about the armillary sphere
• armillary sphere was used in the calculation of star catalog

It was not known about his economic means and also about how he is getting the support for his scientific activities. Coins were made in second and third centuries with his honor in Bithynia. It shows his name and a globe which supports the tradition of where he was born.

Hippocras's biographies were written by following people. What we know about him now were all their works.

• Strabo's geography Pliny's natural history in the first century;
• Ptolemy in the second century;
• Pappus and Theon of Alexandria in the fourth century.

He also discovered motion of the moon and orbit of the moon. He died in 120 BC at the age of 70 years.

Trigonometry is a branch of mathematics which studies about relationships that involve lengths and volumes of triangles. During the 3rd Century BC, in Hellenistic world changes form applications of geometry to astronomical studies.

In the 3rd century, astronomers from that time noted the lengths of the sides of a right-angle triangle. The angles between those sides have fixed relationships too. For example, if any of the side of a triangle and an angle between two sides can be known, then all other side lengths and angles can be known.

These type of calculations can be known trigonometric functions. These are pervasive in both pure and applied mathematics. Trigonometry can also be used as a foundation of surveying. Trigonometric functions can be used in many fields such as physics, mechanical engineering, electrical engineering, music, acoustics, astronomy, ecology, and biology.