Euler Identity in Home

[ColinJDenman]

Hmmm... part 2

Further fiddling shows, in Home mode,
in degrees mode sin(180) = 0
in radians mode sin(pi) = -2.07E-13

But e^i*pi in degrees mode gives the 2.07E-13. I begin to feel this is less a question of Exact versus Approximate, but rather some inconsistency internally.

In CAS with exact checked (with Solve as the app (just because it was set to Radians))
sin(pi) = 0
and with Parametric as the app (set to degrees)
sin(180) = 0

With exact, CAS, degrees (Para)
e^i*pi +1 = 0 // yippee
exact, CAS, radians (Solve)
e^i*pi + 1 = 0
With exact unchecked, in CAS, degrees (Parametric)
e^i*pi + 1 = 1.078E-14i
in radians (Solve)
... exactly the same

Am I wrong to be confused :-) It's making me suspicious of the results I get (which on some level is probably a good thing). I'm not sure I can trust my Prime any more, which isn't a good attribute in a calculator.