Giải phương trình lượng giác sau

November 21, 2008 at 8:28 am (Toán học)

<img src=”http://www.problem-solving.be/cgi-bin/mathtex.cgi?\[
{\rm{1 }} + {\rm{ sinx }} + {\rm{ cosx }} + {\rm{ sin2x }} + {\rm{cos2x }} = {\rm{ }}0{\rm{ }}
\]
” align=”middle” border=”0″ />

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