Question

who founded trignometry

Answer 1

Hipparchus of Nicaea' (/hɪˈpɑːrkəs/; Greek: Ἵππαρχος, Hipparkhos; c. 190 – c. 120 BC) was a Greek astronomer, geographer, and mathematician. He is considered the founder of trigonometry but is most famous for his incidental discovery of precession of the equinoxes.

Answer 2

first hipparchus and then a Greek mathematician menelaus