Posted by Dan McEachern on September 13, 2016 at 02:16:27:

In Reply to: Re: Find the angle from Inverse involute function posted by BillS on September 04, 2016 at 14:40:26:

Bill- yes that's a whole lot easer than interpolating from a table. Suppose you could do the same in Excel, but I'm somewhat lazy so this was a perfect solution.
Glad to have the infinite series info also, just in case I find time to write an Excel solution. thanks dimebag!