title: Maple, converting from polar to cartesian expression?
body: <p>In Maple I have a polar expression</p>
  
  <p><img src="https://i.imgur.com/5uo9p1m.png" alt="enter image description here"></p>
  
  <p>and I need to convert it to a Cartesian expression. Though the <code>convert</code> function of Maple doesn't seem to have an option for this.</p>
  
  <p>I currently have a by-hand conversion:</p>
  
  <p><img src="https://i.imgur.com/4Zjc6bA.png" alt="enter image description here"></p>
  
  <p>Though there has to be a proper automatic version, isn't there?</p>
  
  <p>Thanks!</p>