"Abu'l-Wafa is best known for the first use of the tan function and compiling tables of sines and tangents at 15' intervals. This work was done as part of an investigation into the orbit of the Moon, written down in Theories of the Moon." https://mathshistory.st-andrews.ac.uk/Biographies/Abul-Wafa/ #History #Maths #Science @science

Source: https://twitter.com/StA_Maths_Stats/status/1667473952032030720