- #1

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## Homework Statement

Write ##5-3i## in the polar form ##re^\left(i\theta\right)##.

## Homework Equations

$$

|z|=\sqrt {a^2+b^2}

$$

## The Attempt at a Solution

First I've found the absolute value of ##z##:

$$ |z|=\sqrt {5^2+3^2}=\sqrt {34} $$.

Next, I've found $$ \sin(\theta) = \frac {-3} {\sqrt {34}} \\ \cos(\theta) = \frac {5} {\sqrt {34}}.$$ I don't know what to do next because I haven't found any exact value from these numbers...