Determine if this frame's basis is right-handed. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2012 
Syntax
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Return Value
True if this frame's basis is right-handed, false if not.Remarks
 The three basis vectors are "right-handed" if the triple vector product [vecX, vecY, vecZ] is positive, or equivalently if dot(vecX x vecY, vecZ) is positive, where "dot" represents the dot product.