The Aryabhatiya is a treatise on mathematics and astronomy written by Aryabhata in 499 CE. It is considered to be one of the most important works in the history of Indian mathematics.

Aryabhata estimated the value of pi to be 3.1416, which is accurate to four decimal places.

The Aryabhatiya covers trigonometry, algebra, and astronomy, but not geometry.

The Pythagorean theorem is a well-known theorem in geometry that states that the sum of the squares of the two sides of a right triangle is equal to the square of the hypotenuse.

Aryabhata developed the sine, cosine, and tangent functions, but not the cosecant function.

Vieta's formula is a well-known formula in algebra that states that the product of the two roots of a quadratic equation is equal to the constant term.

Aryabhata developed the methods of completing the square, factoring, and using a geometric construction for solving quadratic equations, but not the quadratic formula.

Aryabhata developed a geocentric model of the universe, which placed the Earth at the center of the universe.

Aryabhata studied the Sun, Moon, and planets, but not stars.

The Aryabhatiya contains Aryabhata's astronomical calculations.

Aryabhata used the units of time day, month, and year, but not hour.

Aryabhata developed the Aryabhata calendar, which is a solar calendar.

Aryabhata developed the concepts of zero and negative numbers, but not irrational numbers or infinity.

Aryabhata used the symbol 0 to represent zero.

Aryabhata developed the concepts of zero and negative numbers, but not the concepts of irrational numbers or infinity.