HP Prime not Computing Correctly

[pschlie]

(02-26-2023 02:50 PM)Nigel (UK) Wrote:  ... Archimedes found that the area of a circle of unit radius lies between 223/71 and 22/7 (again from Wikipedia). He wasn't using radians.

Being also before the advent of calculus ...

I guess it is somewhat arbitrary how one prefers to specify angular values; radians could have been defined as the angular value circumscribing a circle having an extent between 0 and 1; but suspect defining it as having the same value as the length of the arc it corresponds to, divided by its radius, is a likely a bit more useful. I further agree that defaulting to an assumption of degree angular measurement absent presence of pi, is not likely a good idea; What's ideal? I guess it's largely a matter of personal preference, and typical use. (Maybe it's degree values which should be explicitly identified as such, and all else presumed to be otherwise?)