Find the modulus and argument of the following complex number and hence them in the polar form:`\ 1-i`

Explanation

`z=1-i`

`r=|z|`

`=sqrt{1+1}`

`=sqrt{2}`

Let `tan alpha=|frac{{Im}(z)}{{Re}(z)}|`

`therefore tan alpha=|frac{-1}{1}|`

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