Involute Spline Function
If VAPA1 = (Tan PA1) - (Arc PA1) = INVPA1
The AGMA "Manual of Gear Design" book descibes this as a "vectorial angle".
The book gives an example:
VAPA1 = (Tan 14.5°) - ((PI/180) * 14.5°) = .00554
INVPA1 = .00554
If I have INVPA2 = .057897
I need to find PA2
Using a spreadsheet, I got .
Originally Posted by FlabbyRoach
Could you explain how to reverse the equation to find that answer?