title: How to find a third point using two other points and their angle
body: <p>I found an answer here, but can't understand how to transfer the math to Objective C</p>
  
  <p><a href="https://stackoverflow.com/questions/4280805/find-the-third-point">Find the third point</a></p>
  
  <p>I have two points and I also have the angle relative to the axes. How do I find a third point which will form a straight line? The distance should be variable. </p>