Aryabhata, a renowned ancient Indian mathematician and astronomer, made significant contributions to the field of trigonometry. He developed the sine function, which is a fundamental concept in trigonometry and is used to calculate the ratio of the length of the opposite side to the length of the hypotenuse in a right triangle.

Jantar Mantar is an ancient Indian astronomical observatory built in the 5th century CE. It consists of a collection of architectural astronomical instruments, including sundials, quadrants, and astrolabes. Jantar Mantar is still in use today and is a testament to the advanced astronomical knowledge of ancient India.

Charaka Samhita is an ancient Indian medical text written by Charaka, a renowned physician. It is considered one of the most comprehensive and influential works on medicine in history. The text covers a wide range of medical topics, including anatomy, physiology, pathology, and treatment.

Shalaka is the name of the ancient Indian surgical instrument that was used to perform cataract surgery. It is a thin, needle-like instrument that was used to extract the cataract from the eye.

Karikala Chola, an ancient Indian engineer and king, is credited with the construction of the Grand Anicut, a massive irrigation system that is still in use today. The Grand Anicut is a testament to the advanced engineering skills of ancient India.

Aryabhatiya is an ancient Indian text written by Aryabhata, a renowned mathematician and astronomer. It contains a detailed description of the decimal system, including the use of zero as a placeholder.

Aryabhata, a renowned ancient Indian astronomer, proposed the heliocentric model of the solar system, where the Earth and other planets revolve around the Sun. This model was later adopted by Nicolaus Copernicus in the 16th century.

Susruta Samhita is an ancient Indian medical text written by Susruta, a renowned surgeon. It describes various surgical procedures, including rhinoplasty (nose surgery), cataract surgery, and plastic surgery.

Raja Raja Chola I, an ancient Indian engineer and king, is credited with the construction of the Brihadeeswarar Temple, a UNESCO World Heritage Site known for its architectural and engineering marvels.

Arthashastra is an ancient Indian text written by Kautilya, a renowned economist and political strategist. It contains a detailed description of the process of extracting metals from ores, including gold, silver, copper, and iron.

Aryabhata, a renowned ancient Indian astronomer, developed a method for calculating the circumference of the Earth. His method involved using the angle of the Earth's shadow during a lunar eclipse to determine the Earth's radius.

Charaka Samhita is an ancient Indian medical text written by Charaka, a renowned physician. It describes various methods of treating diseases using herbal remedies, including the use of plants, minerals, and animal products.

Qutb-ud-din Aibak, an ancient Indian engineer and ruler, is credited with the construction of the Qutb Minar, a UNESCO World Heritage Site known for its architectural and engineering marvels.

Arthashastra is an ancient Indian text written by Kautilya, a renowned economist and political strategist. It contains a detailed description of the process of making steel, including the use of iron ore, charcoal, and a furnace.

Aryabhata, a renowned ancient Indian astronomer, developed a method for calculating the distance between the Earth and the Moon. His method involved using the angle of the Moon's shadow during a lunar eclipse to determine the distance between the two celestial bodies.