Al-Battani

https://en.wikipedia.org/wiki/Al-Battani

Abū ʿAbd Allāh Muḥammad ibn Jābir ibn Sinān al-Raqqī al-Ḥarrānī aṣ-Ṣābiʾ al-Battānī [n 1](Arabic: محمد بن جابر بن سنان البتاني‎) (Latinized as Albategnius, Albategni or Albatenius) (c. 858 – 929) was a Syrian Arab astronomer, and mathematician. He introduced a number of trigonometric relations, and his Kitāb az-Zīj was frequently quoted by many medieval astronomers, including Copernicus. Often called the "Ptolemy of the Arabs", al-Battani is perhaps the greatest and best known astronomer of the medieval Islamic world.