The Importance of Preserving and Promoting Indian Contributions to Trigonometry

Aryabhata, who lived in the 5th century CE, is often referred to as the father of trigonometry due to his significant contributions to the field.

The sine function is defined as the ratio of the length of the opposite side to the length of the hypotenuse in a right triangle.

Aryabhata developed the concept of the sine table, which provided values of the sine function for different angles.

The cosine function is defined as the ratio of the length of the adjacent side to the length of the hypotenuse in a right triangle.

Bhaskara II is credited with developing the concept of the tangent function.

The cosecant function is defined as the ratio of the length of the hypotenuse to the length of the opposite side in a right triangle.

Madhava of Sangamagrama is known for his work on the development of the sine series and the cosine series.

The secant function is defined as the ratio of the length of the hypotenuse to the length of the adjacent side in a right triangle.

Bhaskara II is credited with developing the concept of the cotangent function.

The cotangent function is defined as the ratio of the length of the adjacent side to the length of the opposite side in a right triangle.

Madhava of Sangamagrama is known for his work on the development of the versine function and the haversine function.

The tangent function is defined as the ratio of the length of the opposite side to the length of the adjacent side in a right triangle.

Brahmagupta is credited with developing the concept of the sine-cosine theorem.

The cosecant function is defined as the ratio of the length of the hypotenuse to the length of the opposite side in a right triangle.

Madhava of Sangamagrama is known for his work on the development of the sine series and the cosine series.