It has been 55+ years since I had to do trig. I wear very large
"L" plates when working my lathe.

I have to make an inside tapered sleeve to repair the steering ball
taper on my tractor to compensate for 46 years of wear. I have
replaced the Tie rod end, however the wear is in the steering arm
part, which is why I have to make a sleeve. I will bore out the
steering arm and fit the sleeve which will match the tie rod end
taper.

Tractor is 1964 Fordson Super Major - Ford 5000 in USA ?
Fitted with Eaton power steering unit.

Dimensions of the taper are

top 19 mm (0.75 inch) diameter
bottom 16 mm (0.63 inch) diameter
length between
top & bottom 25.4 mm (1.0 inch)

How do I calculate the degrees so I can set the compound to cut the
taper ?

Thanks
Alan