Can you find out where I am going wrong?
When it gets substituted in it produces
due to the trigonometric identity of
when multiplied out this goes to
when this is integrated it becomes
therefore the area should be
Which then gets to (almost there, I promise)
and because sin(0) is 0 I left the second half out.
I believe that I went wrong when I insert the values but I don't know how to change them