# Who is Varahamihir ?

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- An Astronaut
- A Space Shuttle
- A power station
- An Ancient Astronomer

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Varahamihira is an Ancient Astronomer from India. He was born in Avanti on 505 CE and died on 587 CE. He is pioneer in mathematics and a great astronomer.

**Pancha-Siddhantika** is the main book of Varahamihira based on mathematical astronomy.

He is also a great mathematician. His work improves trigonometry (relation between sine and cosine), Optics, Arithmetic, binomial coefficient etc. He also worked to improve some of Aryabhatta’s theories.