Hey MathIsOhSoHard.
Can you take the tangent of both sides (since arg is in terms of arctan) and simplify that way?
Solution:
My attempt:
Can somebody explain why the solution differs from my solution?
I have tested Arg(iw) with any number w>0 and they all give me pi/2?
Also I don't understand how they got the subtraction when mine ends up being a sum?