Answer:
Hipparchus was best known for his tremendous contributions to the fields of astronomy and mathematics, specifically to the foundations of trigonometry as a discipline.
Step-by-step explanation:
Hipparchus was a Greek scientist born on 190 BC. Among his notable works, he correctly measured the distance between the Earth and the moon, he discovered the precession of the equinoxes, as well as compiling a table of angles to simplify the calculation of triangles.