Abu al-Wafa' Buzjani (940–998 CE), also known as Abu al-Wafa al-Buzjani, was a Persian mathematician, astronomer, and mathematician from the Islamic Golden Age. Born in Buzjan, Iran, he made significant contributions to mathematics and astronomy. Abu al-Wafa' is best known for his work in trigonometry, where he introduced new trigonometric techniques and tables, including sine and tangent functions. He also made advancements in spherical trigonometry and studied the motion of celestial bodies. Abu al-Wafa's works had a lasting impact on the development of mathematics and astronomy in both the Islamic world and Europe. His legacy continues to be recognized for his contributions to trigonometry and the broader field of mathematics.