title: Drawing line graph using Quartz?
body: <p>I am trying to make a simple graph for the ipad. I need to plot sin(x), cos(x) and tan(x) functions using QUARTZ. I know how to make the grid and the lines, but have no idea how to start with this. Any help is appreciated.</p>
  
  <p>Please note I am not interested in core plot and other frameworks so please don't offer this as an answer.</p>