Transformation von Polarkoordinaten in Kartesische Koordinaten
<a href="https://de.wikipedia.org/wiki/User:Honina" class="extiw" title="de:User:Honina">Honina</a>, adding color and vectorized by Carstenvogel
CC BY-SA 4.0
<a href="//commons.wikimedia.org/wiki/File:Ebene_polarkoordinaten.PNG" title="File:Ebene polarkoordinaten.PNG">File:Ebene polarkoordinaten.PNG</a>