# What did Hipparchus do for trigonometry?

## What did Hipparchus do for trigonometry?

Hipparchus’s most significant contribution to mathematics may have been to develop—if not actually invent—a trigonometry based on a table of the lengths of chords in a circle of unit radius tabulated as a function of the angle subtended at the centre.

Who was the founder of trigonometry?

Hipparchus
The first known table of chords was produced by the Greek mathematician Hipparchus in about 140 BC. Although these tables have not survived, it is claimed that twelve books of tables of chords were written by Hipparchus. This makes Hipparchus the founder of trigonometry.

### Did Hipparchus invent trigonometry?

Hipparchus of Nicaea (/hɪˈpɑːrkəs/; Greek: Ἵππαρχος, Hipparkhos; c. 190 – c. 120 BC) was a Greek astronomer, geographer, and mathematician. He is considered the founder of trigonometry, but is most famous for his incidental discovery of precession of the equinoxes.

Who is the father of trigonometry and his contribution?

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.

#### Who was influenced by Hipparchus?

Ptolemy relied on it heavily when he compiled a larger catalog in his Almagest 300 years later. Ptolemy probably copied most of his catalog from Hipparchus’s, updating it to take precession into account.

When was Hipparchus born?

190 BC
Hipparchus/Date of birth

Hipparchus was born in Nicaea, Bithynia (now Iznik, Turkey), circa 190 B.C. He spent much of his time in Rhodes, Greece. Very little is known about his life, but he was one of the greatest astronomers and mathematicians of antiquity.

## Did aryabhatta invented trigonometry?

His definitions of sine (jya), cosine (kojya), versine (utkrama-jya), and inverse sine (otkram jya) influenced the birth of trigonometry. He was also the first to specify sine and versine (1 − cos x) tables, in 3.75° intervals from 0° to 90°, to an accuracy of 4 decimal places.

Who is the father of Triangle?

Many have speculated that the claims of the 5th-century BC Greek mathematician Pythagoras being the first to deduce facts about right-angled triangles just did not add up. Some believe later commentaries indicate it was the collaborative work of his followers, the Pythagoreans.

### Who is the father of logarithm?

John Napier
Logarithm/Inventors
The Scottish mathematician John Napier published his discovery of logarithms in 1614. His purpose was to assist in the multiplication of quantities that were then called sines.

Who discovered the precession of equinoxes?

Hipparchus. Hipparchus, (b. Nicaea, Bithynia–d. after 127 BC, Rhodes?), Greek astronomer and mathematician who discovered the precession of the equinoxes, calculated the length of the year to within 6 1/2 minutes, compiled the first known star catalog, and made an early formulation of trigonometry.

#### When was Hipparchus died?

120 BC
Hipparchus/Date of death

Who wrote aryabhatta?

Aryabhata

Āryabhaṭa
Era Gupta era
Main interests Mathematics, astronomy
Notable works Āryabhaṭīya, Arya-siddhanta

## What did Hipparchus contribute to trigonometry?

He is considered the founder of trigonometry, but is most famous for his incidental discovery of precession of the equinoxes. Hipparchus was born in Nicaea, Bithynia, and probably died on the island of Rhodes, Greece.

Who invented trigonometry?

Trigonometry, which simplifies the mathematics of triangles, making astronomy calculations easier, was probably invented by Hipparchus. Hipparchus compiled a table of the chords of angles and made them available to other scholars.

### What is the biography of Hipparchus like?

Hipparchus Biography. Hipparchus was a Greek astronomer and mathematician. He is known for discovering the change in the orientation of the Earth’s axis and the axis of other planets with respect to the center of the Sun. He was also the inventor of trigonometry. He had immense in geography and was one of the most famous astronomers in ancient…

What did Hipparchus of Nicaea contribute to astronomy?

Hipparchus of Nicaea (/hɪˈpɑːrkəs/; Greek: Ἵππαρχος, Hipparkhos; c. 190 – c. 120 BC) was a Greek astronomer, geographer, and mathematician. He is considered the founder of trigonometry but is most famous for his incidental discovery of precession of the equinoxes.

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