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October 16th, 2013, 08:10 AM  #1 
Newbie Joined: Oct 2013 Posts: 23 Thanks: 0  finding general solution
First, thanks for answering my question, it really helps me a lot. Second, sorry for the any inconvenience caused. Actually, the question also provided another equation, but I just somehow missed it. Sorry. Here is the equation: http://imageshack.us/photo/myimages/547/firh.jpg/ 
October 16th, 2013, 01:59 PM  #2 
Global Moderator Joined: Dec 2006 Posts: 20,472 Thanks: 2039 
cos(?  ?) ? cos(?)cos(?) + sin(?)sin(?), so ?(A² + B²)cos(?  ?) = Acos(?) + Bsin(?), not Acos(?) + Bcos(?).


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