Trigonometry

Islamic scholars made groundbreaking contributions to science, medicine, mathematics, and astronomy during the 8th-15th centuries, preserving ancient knowledge and advancing human understanding through systematic research and institutional support.

Islamic mathematicians revolutionized mathematics during the Golden Age, developing algebra, advancing geometry and trigonometry, introducing the decimal system, and making groundbreaking contributions that laid foundations for modern mathematics.

Nasir al-Din al-Tusi (1201-1274) was a mathematician, astronomer, philosopher and theologian who directed the Maragha observatory under the Ilkhanids, made trigonometry a discipline in its own right, and devised the geometrical device known as the Tusi couple.