 He was also a pioneer in spherical trigonometry.In 830 AD, Habash al-Hasib al-Marwazi produced the first table of cotangents.Muhammad ibn Jābir al-Harrānī al-Battānī (Albatenius) (853-929 AD) discovered the reciprocal functions of secant and cosecant, and produced the first table of cosecants for each degree from 1° to 90°.