It is the case of a pitiful fallacy.
He bases the 90º intercept on the 10º AoB and determines the 10º AoB from the 90º intercept! There's a name for that............Excel slams me with it occasionally.............I'll think of it..........
Circular Reference!!! Two fallacies leaning on each other for proof. Fail.
Bet you didn't know that trees cause wind by waving their branches....
You know, if tater jumps into one of my threads (he has done that) and says "RR, there's a problem with your calculation there" I pay close attention, fix the problem and thank him. He doesn't say much, but when he does he has something valid to say.