The Surya Siddhanta, an ancient Indian astronomical text, provides rules for calculating the circumference of the Earth.

Aryabhata, an Indian mathematician and astronomer, is credited with developing the concept of sine.

The Brahmagupta Siddhanta, an Indian mathematical and astronomical text, provides rules for calculating the area of a triangle.

Brahmagupta, an Indian mathematician and astronomer, is credited with developing the concept of zero.

The Aryabhatiya, an Indian mathematical and astronomical text, provides rules for calculating the volume of a sphere.

Aryabhata, an Indian mathematician and astronomer, is credited with developing the concept of the decimal system.

The Lilavati, an Indian mathematical text, provides rules for calculating the square root of a number.

Madhava of Sangamagrama, an Indian mathematician and astronomer, is credited with developing the concept of the sine function.

The Aryabhatiya, an Indian mathematical and astronomical text, provides rules for calculating the area of a circle.

Madhava of Sangamagrama, an Indian mathematician and astronomer, is credited with developing the concept of the cosine function.

The Brahmagupta Siddhanta, an Indian mathematical and astronomical text, provides rules for calculating the volume of a cylinder.

Madhava of Sangamagrama, an Indian mathematician and astronomer, is credited with developing the concept of the tangent function.

The Lilavati, an Indian mathematical text, provides rules for calculating the area of a rectangle.

Madhava of Sangamagrama, an Indian mathematician and astronomer, is credited with developing the concept of the secant function.

The Brahmagupta Siddhanta, an Indian mathematical and astronomical text, provides rules for calculating the volume of a cone.