Habash Al‑Hasib Al‑Marwazi (أحمد بن عبد الله . . .
| Use attributes for filter ! | |
| Gender | Male |
|---|---|
| Born | Merv |
| Turkmenistan | |
| Died | Samarra |
| Iraq | |
| Children | Abu Ja'far ibn Habash |
| Date of Reg. | |
| Date of Upd. | |
| ID | 2282307 |
Habash Al‑Hasib Al‑Marwazi (أحمد بن عبد الله . . . Life story
Ahmad ibn 'Abdallah Habash Hasib Marwazi 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. He flourished in Baghdad, and died a centenarian after 869.
