EVERYDAY SCIENCE

Detailed explanation-1: -Nasir al-Din al-Tusi was born in the city of Tus in medieval Khorasan (northeastern Iran) in the year 1201 and began his studies at an early age. In Hamadan and Tus, he studied the Quran, Hadith, Ja’fari jurisprudence, logic, philosophy, mathematics, medicine, and astronomy.

Detailed explanation-2: -Al-Tusi was born in Tus, which lies close to Meshed in northeastern Iran high up in the valley of the Kashaf River. He was born at the beginning of a century which would see conquests across the whole of the Islamic world from close to China in the east to Europe in the west.

Detailed explanation-3: -Naṣīr al-Dīn al-Ṭūsī, in full Muḥammad ibn Muḥammad ibn al-Ḥasan al-Ṭūsī, (born Feb. 18, 1201, Ṭūs, Khorāsān [now Iran]-died June 26, 1274, Baghdad, Iraq), outstanding Persian philosopher, scientist, and mathematician.

Detailed explanation-4: -In mathematics, al-Tusi pioneered spherical trigonometry and treated trigonometry as a new mathematical discipline. He developed six fundamental formulas for the solution of spherical right-angled triangles. He wrote on binomial coefficients, which Blaise Pascal later introduced.