section_path: Contributions/Trigonometry
section_name: Trigonometry
paragraph_text: Trigonometry
  
  Al-Khwārizmī's Zīj as-Sindhind contained tables for the trigonometric functions of sines and cosine. A related treatise on spherical trigonometry is attributed to him.
  
  Al-Khwārizmī produced accurate sine and cosine tables, and the first table of tangents.