title: I want to find angle between two location respective to third location
body: <p><img src="https://i.stack.imgur.com/0sldl.png" alt="There are three location on map. Location A , Location B and Location C. "></p>
  
  <p>There are three location on map. Location A , Location B and Location C. </p>
  
  <p>I have only latitude and longitude of all three location.</p>
  
  <p>Now i want to find angle "<strong>B</strong>" with respect to <strong>"A"</strong> and <strong>"C"</strong> in <strong>android map</strong>.</p>
  
  <p>Please help me. </p>