Q.
QUIZ -WHO discovered the the law of sines for spherical triangles] discovered the law of tangents for spherical triangles, and provided proofs for these laws?
Asked by truth exposed,
23 Oct '12 12:24 pm
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It is variously attributed to al-Khujandi, Abul Wafa Bozjani, Nasir al-Din al-Tusi and Abu Nasr Mansur.
Answered by always fresh, 23 Oct '12 12:25 pm
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