Subtracting Phasors Gives Wrong Answer

[Carl_Doverman]

In the HP Prime, I entered:

120<0 - 120<60 where < is the phasor symbol (SHIFT + MULTIPY)

I get <(120,0)+114.2+36.5i as the result.

This result, is completely wrong. 

The TI-36X Pro that I used gave me the correct answer, which was:

<(120,0)-(60+103.9i), which is correct...

I have read other posts, none of which have helped me. 

I don't want to be profane about this situation but this calculator has proven itself to be horribly undependable and completely overcomplicated. This has been such a disappointing purchase.  If this situation is not nicely sorted out, I might have to resort to buying a TI-NSPIRE CX CAS, which, from what I've seen, seems to give concise answers to many of the engineering problems I have, while this junk spews some sort of jargon which I have to manually simplify on paper. Please help me.

[normeE]

I get what you got in Radians angle measure (settings).

I get what TI got in Degrees angle measure.  May be a settings problem.

[Tim_Wessman]

Yup, you are in radians not degrees. Tap top left corner of the screen, tap the <o instead of <pi.

Press HOME, type your 120<0 - 120<60 and press enter. You'll see the result. Press the angle key again to toggle back and forth between the angle/*i forms.

note that you could ALSO do this by adding in a degree symbol on your 60. Doing 120<0 - 120<60° would have worked in any mode. That symbol can be found on the shift [a b/c] key next to the backspace.