angle(sin(z)), included for completeness, but doesn't illustrate well (-pi == pi)
<a href="//commons.wikimedia.org/wiki/User:Pengo" title="User:Pengo">Pengo</a>
This <i>W3C-unspecified</i> plot was created with <a href="https://en.wikipedia.org/wiki/Matplotlib" class="extiw" title="w:Matplotlib">Matplotlib</a>.