How does the DM42 accuracy compare to other calculators ?

[Michael de Estrada]

(12-20-2017 08:18 PM)Logan Wrote:  If I'm reading it right (I'm not the most adept with how the 34S deals with complex numbers), the result of the operation is
-2 + i4.769e-16

Yes, that is correct. The WP34S uses the X register for the real part and the Y register for the imaginary part. To perform functions in complex mode the function key is preceded by the CPX key. It’s very simple and intuitive IMO.

The thing about the WP34S is that you can switch to double precision mode to increase the accuracy of calculations. Using h MODE DBLON and performing -2 ln e^x yields the result
-2.000 -i2.316E-34, which is the same result as the DM42.