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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?

Tags: relationships, law, triangles
Asked by truth exposed, 23 Oct '12 12:24 pm
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Answers (3)

 
1.

Nasir al-Din al-Tusi
Answered by aflatoon, 23 Oct '12 12:25 pm

 
  
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2.

Nasir al-Din al-Tusi
Answered by jameel ahmed, 23 Oct '12 12:35 pm

 
  
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3.

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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