FP2 Complex Numbers Question Watch

JMoi
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So I’m sitting the old syllabus this year, although I assume this topic is still on the new one. In this example I don’t understand why we go from arg((x-2)+iy) to y/(x-2)

If anyone can help out I’d be greatful 😁😁

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old_engineer
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tan(arg(complex number)) = (imaginary component) / (real component)
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