TEXT

al-Risālat al-watr wa-al-jayb

Title (arabic)

الرسالة الوتر والجيب

Title (translit)

al-Risālat al-watr wa-al-jayb

Author

Language

Arabic

Subject

Notes

In his Miftāḥ al-ḥisāb, Kāšī lists this treatise on the chord and sine among this compositions. In the work Kāšī calculates the value of sin 1° to ten sexagesimal places.

ismi_id

500123

Literature References

İhsanoğlu, Ekmeleddin, and Boris Rozenfeld. 2003. Mathematicians, Astronomers And Other Scholars Of Islamic Civilisation And Their Works (7Th-19Th C.). Istanbul: Research Centre for Islamic History, Art, and Culture.

P. 270 (no. 802), M4.

Khalifa, Hajji, and Gustav Flügel. 1835. Hajji Khalifa. Kashf Al-Ẓunūn ʿan Asāmī Al-Kutub Waʾl-Funūn = Lexicon Bibliographicum Et Encyclopaedicum A Mustafa Ben Abdallah Katib Jelebi Dicto Et Nomine Haji Khalfa Celebrato Compositum. 7 vol.. Leipzig-London: R. Bentley for the Oriental Translation Fund of Great Britain and Ireland.

3:452 (no. 6406).

Youschkevitch, A. P., and B. A. Rosenfeld. 1973. “Al-Kāshī”. In Dictionary Of Scientific Biography, 7:255-62. New York: Charles Scribner's Sons.