Backing Angle = arctan (sin Hip Pitch Angle ÷ tan Plan Angle)
Backing Angle = arccos (cos Common Pitch Angle ÷ cos Hip Pitch Angle)
Backing Angle = arcsin (sin Common Pitch Angle × cos Plan Angle)
Backing Angle Formulas
Backing Angle Formulas derived from Geometry
Backing Angle = arctan (sin Hip Pitch Angle ÷ tan Plan Angle)
Backing Angle = arccos (cos Common Pitch Angle ÷ cos Hip Pitch Angle)
Backing Angle = arcsin (sin Common Pitch Angle × cos Plan Angle)