Answer
Sine and cosine tables are significant contributions made by al-Khwarizmi in the field of trigonometry. These tables provided accurate values for trigonometric functions, enabling mathematicians and scientists to perform complex calculations involving angles and triangles. Al-Khwarizmi's work laid the foundation for the development of trigonometry as a distinct mathematical discipline, and his tables remain essential tools in various fields today, including navigation, surveying, and engineering.