Question

the first use of the idea of sine by​

Answer 1

Answer:

The earliest known reference to the sine function is from Aryabhata the Elder, who used both ardha-jya (half-chord) and jya (chord) to mean sine in Aryabhatiya, a Sanskrit text finished in 499 CE. Jya, meaning chord, became jiba in Arabic, and was abbreviated as just jb.