Are the Derivatives in Legacy Tab per Radians or Per Degrees?

This is a very straight forward question. There appears to have some places
that Derivatives values in Legacy Tab are Per Rads, others it seems they are
Per Degree. Is it possible if this was made clear, if they are both used in
some places, or just one, and which is it? It would be nice, for future SDK
updates, to aways specify the Units when possible! Thanks