The case of the disappearing angle units, or "the dangle of the angle"

[ijabbott]

I'd quite like a calculator where the standard trig functions only worked in radians, at least for writing programs. You could then have some non-standard trig functions such as SIND/ASIND for angles in degrees, etc., as well as functions for converting between angle units (so SIND would be more or less equivalent to D->R SIN, perhaps avoiding any D->R rounding error). If there is an angle mode setting, it would only affect which set of trig functions the keys map to.