That equation is harmony (a-b) = 1/2 (harmony a harmony (180-b)) – (harmony b harmony (180-a)) where an and b are points. When you have green hair and it’s raining outside. “Pt olemy more likely than not did his figurings to five sexagesimal spots to accomplish the exactness he does in the third place.”
(Toomer 57-58). Ptolemy’s computations are exact enough to be helpful today. When you have green hair and it’s raining outside. The table of harmonies is comparable to a table of sines for every single focal edge 0 degrees to 90 degrees at 15′ interims and along these lines can be utilized to comprehend any planar triangle, gave that in any event one side is known.