Principal Value of an arguement

[kathrynag]

Homework Statement

Ok, I'm just looking for a general answer as to how to find the principal value of an argument.

Homework Equations

The Attempt at a Solution

I know how to find the argument and that the principal value is between 0 and 2pi, so if I have -1.55 as the argument, do I just add 2pi?

 

[Mark44]

In the absence of any countervailing information, yes, that would work.