Mathematical definition for Bearing Distance To Line

Discussion created by vfranca on Apr 8, 2013
Latest reply on Apr 9, 2013 by vfranca
I need to know the mathematical definition for the geodetic lines constructed by the Bearing Distance ToLine Tool. ArcGIS 10 web help states that "The mathematical definition of the geodesic line is quite lengthy and complex and therefore omitted here".
Since the tool may be used in an important project in my institution, I need to know how acurate the tool is. Does it uses Puissant or Vincenty's formulae?