title: Calculate trajectory given a coordinate and angle
body: <p>Given the following:<br />
  - starting point (coordinate)<br />
  - angle (degree)<br />
  - velocity</p>
  
  <p>.. I'd like to calculate the given trajectory.<br />
  For example for the image below w/ velocity 1: (10,10) (9,9) (8,8) (7,7) ..</p>
  
  <p>It should be able to move in all directions.<br />
  How can I calculate it?</p>
  
  <p><img src="https://i.stack.imgur.com/MnRTf.png" alt="example"></p>