What was francois viete most famous work?

François Viète is most famous for his work in algebra, particularly for introducing systematic notation for representing unknowns and parameters, which laid the groundwork for modern algebra. His notable work includes "In Artem Analyticam Isagoge" (Introduction to Analytical Art), where he developed methods for solving polynomial equations. Viète's contributions significantly advanced the field of mathematics, influencing future generations of mathematicians.