1 янв 1250 г. - Nasir al-Sin al-Tusi
Описание:
The work of Nasir al-Din al-Tusi, Treatise on the Secrets of the Sector Figure, is the first treatment of trigonometry in its own right, as a complete subject apart from astronomy. He attempts to develop a form of non-Euclidean geometryДобавлено на ленту времени:
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1 янв 1250 г.
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~ 775 г назад