Who was born earlier, Habash al-Hasib al-Marwazi or Mostafa El-Sayed?
Habash al-Hasib al-Marwazi: Ahmad ibn 'Abdallah Habash Hasib Marwazi (766 - d. after 869 in Samarra, Iraq ) was a Persian astronomer, geographer, and mathematician from Merv in Khorasan who for the first time described the trigonometric ratios: sine, cosine, tangent and cotangent.
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