Aryabhata is widely regarded as the father of Indian mathematics. He lived in the 5th century CE and made significant contributions to various fields of mathematics, including arithmetic, algebra, and astronomy.

Brahmagupta, who lived in the 7th century CE, is credited with developing the concept of zero. He also formulated rules for arithmetic operations involving zero and introduced the decimal system.

The Pythagorean Theorem is one of the most famous and well-known theorems in mathematics. It states that in a right triangle, the square of the hypotenuse is equal to the sum of the squares of the other two sides.

Bhaskara II, who lived in the 12th century CE, developed the Fibonacci sequence, which is a series of numbers where each number is the sum of the two preceding ones. The sequence begins with 0 and 1, and continues as 1, 2, 3, 5, 8, 13, and so on.

Brahmagupta was the first mathematician to develop the concept of negative numbers. He also developed rules for arithmetic operations involving negative numbers.

Bhaskara II developed the concept of calculus, which is a branch of mathematics that deals with rates of change. He also developed a method for finding the area of a circle.

Aryabhata developed the concept of infinity, which is a mathematical concept that refers to something that is boundless or endless.

Brahmagupta developed the concept of the golden ratio, which is a special number approximately equal to 1.618. It is often found in nature and art.

Aryabhata developed the concept of the sine function, which is a trigonometric function that is used to calculate the ratio of the length of the opposite side to the length of the hypotenuse in a right triangle.

Bhaskara II developed the concept of the cosine function, which is a trigonometric function that is used to calculate the ratio of the length of the adjacent side to the length of the hypotenuse in a right triangle.

Bhaskara II developed the concept of the tangent function, which is a trigonometric function that is used to calculate the ratio of the length of the opposite side to the length of the adjacent side in a right triangle.

Brahmagupta developed the concept of the secant function, which is a trigonometric function that is used to calculate the ratio of the length of the hypotenuse to the length of the adjacent side in a right triangle.

Bhaskara II developed the concept of the cosecant function, which is a trigonometric function that is used to calculate the ratio of the length of the hypotenuse to the length of the opposite side in a right triangle.

Bhaskara II developed the concept of the cotangent function, which is a trigonometric function that is used to calculate the ratio of the length of the adjacent side to the length of the opposite side in a right triangle.