Q
quang1234554321


Giải PT :
[tex]x^{2}+\frac{4}{\pi}tanx+sin2x(cosx+1)+cos2x(sinx+1)=0[/tex]
[tex]x^{2}+\frac{4}{\pi}tanx+sin2x(cosx+1)+cos2x(sinx+1)=0[/tex]
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