solve: 0 = 1+ cos 2x + cos x ......
=easy :
(03-23-2014), (03-23-2014), (03-22-2014)
http://alnasiry.net/forums/search.php?searchid=583 41 - -... ((...
(03-23-2014), (03-22-2014), (03-23-2014), (03-22-2014)
: =easy
: 1 (0 1 )
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