Complex Numbers : Modulus and Argument | ExamSolutions

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Complex numbers - modulus and argument. In this video, I'll show you how to find the modulus and argument for complex numbers on the Argand diagram.
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In this time 3:53-3:56 u said a word i heard it "quargens" what is it?

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It's much easier to just consider this rule:
argz=tan^-1(y/x) (+/ - pi for fourth and third quadrant respectively)
i.e. Add pi if z on the argand diagram falls in the top left quadrant.
Subtract pi if z on the argand diagram falls in the bottom left quadrant.

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