Habash al-Hasib al-Marwazi
Habash al-Hasib al-Marwazi (766 – d. after 869 in Samarra, modern Iraq) was a Persian astronomer, geographer, and mathematician from Merv in Khorasan, who was the first to describe the trigonometric ratios tangent, and cotangent.
Habash flourished in Baghdad, and died a centenarian some time after 869. He worked under two Abbasid caliphs, al-Ma'mun and al-Mu'tasim.
Habash al-Hasib al-Marwazi | |
|---|---|
| Born | Habash al-Hasib al-Marwazi 766 AD Merv |
| Died | 869 AD Samarra |
| Nationality | Persian |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.