Muhyi al-Dīn al-Maghribī

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Muḥyi al-Dīn al-Maghribī, (Arabic,محيي الدين المغربي) (c.1220 – c.1283 Iran) was a Muslim astronomer and mathematician who worked in Damascus, Syria and eventually in the Maragha observatory in Maragha, Ilkhanate of Persia, where he worked under the guidance of Nasir al-Din Tusi. Muhyi al-Din is most known for his works in trigonometry, Book on the theorem of Menelaus, Treatise on the calculation of sines. He is also known for his commentaries on classic Greek mathematical works, in particular, his commentary on Book XV of Elements about measurements of the regular polyhedra.[1][2][3]