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October 16th, 2013, 08:10 AM   #1
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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/my-images/547/firh.jpg/
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October 16th, 2013, 01:59 PM   #2
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cos(? - ?) ? cos(?)cos(?) + sin(?)sin(?), so ?(A + B)cos(? - ?) = Acos(?) + Bsin(?), not Acos(?) + Bcos(?).
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