So you are dealing with complex numbers as I guessed.
As I see it you won't need any pol2rec/rec2pol functions anyway and you may use j instead of i when assigning a variable, too - I used it that way here: http://communities.ptc.com/message/227548#227548!
Also you won't need to write new functions to get the argument in degree. As was also shown in the thread mentioned above you can use the degree sign (or type deg) for input and output as well.
When assigning an angle in degre you may either type deg after the value or type the degree symbol from the keyboard
When showing an evaluation you may either type deg in the space after the displayed value (which will be in rad by default) or you insert the dgree sign from the unit menu (typing it from the keyboard won't work on contrary to Matchcad 15 and below).
So there is no need to do the conversion as in your screenshot.