I'd always been under the impression that Pro/E used degrees as the angular unit throughout - it certainly seems to hold true in Relations.
However, I've just discovered that if you create a Computed Measure in Mechanica which is simply "sin(30)", the result is 0.988 - which is correct for sin(30 rad) but not for sin(30°)!
Is there a setting for this somewhere? Are Computed Measures just different from Relations? I am using a less-familiar config at the moment - should I be looking for something in there?