Aryabhata, a renowned Indian mathematician and astronomer, is often hailed as the 'Father of Trigonometry' for his groundbreaking contributions to the field.

Aryabhata introduced the concept of sine in his treatise 'Aryabhatiya', laying the foundation for the development of trigonometry as we know it today.

Brahmagupta, a brilliant Indian mathematician, further developed Aryabhata's work and established a comprehensive system of trigonometry, including the introduction of the concept of tangent.

Bhaskara II derived the sine and cosine formulas, which are fundamental identities in trigonometry and have far-reaching applications in various fields.

Madhava of Sangamagrama, a renowned Indian mathematician, introduced the concepts of 'jya' and 'koti-jya', which are considered the precursors to the modern sine and cosine functions.

The Indian concept of 'jya' and 'koti-jya' had a profound influence on the development of trigonometry in the West, leading to the development of the sine and cosine functions, facilitating the calculation of planetary positions, and enabling the creation of accurate maps.

Madhava of Sangamagrama made significant contributions to the development of trigonometry, including his work on the infinite series expansions of trigonometric functions, which laid the groundwork for the development of calculus.

Madhava of Sangamagrama's work on infinite series expansions had a profound influence on the development of calculus in the West, providing a foundation for the concept of limits, leading to the development of the derivative and integral, and enabling the calculation of areas and volumes.

Gerbert of Aurillac, a French scholar and mathematician, is credited with introducing Indian trigonometry to Europe through his translation of Arabic texts containing Indian mathematical knowledge.

The introduction of Indian trigonometry to Europe had a transformative impact on Western mathematics, leading to the development of new methods for solving triangles, facilitating the advancement of astronomy and navigation, and enabling the creation of more accurate maps.

Johannes Kepler, a German mathematician and astronomer, made extensive use of trigonometry in his astronomical calculations, particularly in his formulation of the laws of planetary motion.

The Indian concept of 'jya' and 'koti-jya' played a crucial role in the development of spherical trigonometry, enabling the calculation of angles between great circles, facilitating the determination of distances on a sphere, and allowing for the solution of problems involving spherical triangles.

Bhaskara II made significant contributions to the construction of trigonometric tables, which were essential for performing calculations in astronomy and other fields.

The Indian concept of 'jya' and 'koti-jya' had a profound impact on the development of navigation in the West, enabling the calculation of distances between ports, facilitating the determination of latitude and longitude, and allowing for the creation of more accurate maps.

Thomas Harriot, an English mathematician and astronomer, is credited with developing the concept of the tangent, which further expanded the scope of trigonometry.