**Bhaskara** was a indian mathematician, who was the first one to represent numbers in the **Hindu decimal system** with a circle for the **zero. **He was born **saurastra** ( today Gujarat ) India and died in Ashmaka, Andhra Pradesh, India. He received his astronomical education from his father. He and Brahmagupta are two of the most renowned Indian mathematicians who made considerable contributions to the study of fractions. He was a follower of Aryabhata I.

**Bhaskara I** wrote two astronomical works, the * Mahabhaskariya (Great book of Bhaskara )* and the

*in the line of Aryabhata’s schoo. He also wrote commentary, A*

**Laghubhaskariya**( Small book of Bhaskara )*ryabhaṭiyabhasya*– a commentary on Aryabhata I.

The ** Mahabhaskariya **is an eight chapter work on Indian mathematical astronomy.Which include the longitudes of the planets, conjunctions of the planets with each other and with bright stars, eclipses of the sun and the moon, risings and settings, and the lunar crescent.

*is the abridged version of author’s earlier work.*

**Laghubhaskaraiya**His work ** Mahabhaskariya** divides into eight chapters about mathematical astronomy. In this book, he gives a approximation formula for sin x, that leads to a maximum error of less than one percent. The formula is

sinx= 16x(π –x)/[5π^{2}– 4x(π –x)]

Bhaskara I also asked for the solutions of the **Pell equation**. He posed the problem: *“**Tell me, O mathematician, what is that square which multiplied by 8 becomes – together with unity – a square?*“, Which is **Pell Equation **( 8x² + 1 = y² ) .

Thus the works of Bhaskar I is regarded with honour in among the Ancient Hindu Astronomy which has been widely referred in the south of Indian Subcontinent.