Who discovered the trigonometric functions?

Answer 1

Trigonometric functions have their roots in ancient civilizations, with contributions from various cultures. The earliest known use of trigonometric concepts can be traced to the Greeks, particularly Hipparchus in the 2nd century BCE, who compiled a trigonometric table. However, the systematic development of these functions occurred in India between the 5th and 7th centuries CE, with key figures like Aryabhata and Brahmagupta. The functions were later further refined and popularized in the Islamic Golden Age by mathematicians such as Al-Battani and Al-Khwarizmi.