That is exactly how I proceeded earlier. The problem now is, I can't reproduce my work. When I follow the same steps, I don't get the solution A = 60° Instead I get the tautology A = A I must have made an arithmetic error earlier.
Taking a hint from Vohonam's latest maybe I'll try analytic algebra (placing the triangle on the Cartesian Plane) in the morning.
Given that:
re(2): A new theory : Back to Square 1
