## Corollary 1.2.13: Dividing complex numbers geometrically |

If |

We have already shown that

ifz = r cis(t)then= r cis(-t)

But then

1/z = (1/z)(/) = /|z|^{2}= /r^{2}= r cis(-t)/r^{2}= 1/r cis(-t)

But now the result follows from our previous result about multiplication (detail, please).

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