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hainam108


giai phuong trinh luong giac
1, [tex]2\sqrt[]{sin(x-pi/12)}cosx=1[/tex]
2,[tex]\sqrt[]{cos(x-pi/4)^3}-3cosx- sinx=0[/tex]
3, [tex]sinx^{2009}+cosx^{2008}=1[/tex]
chú ý tex+tiêu đề
1, [tex]2\sqrt[]{sin(x-pi/12)}cosx=1[/tex]
2,[tex]\sqrt[]{cos(x-pi/4)^3}-3cosx- sinx=0[/tex]
3, [tex]sinx^{2009}+cosx^{2008}=1[/tex]
chú ý tex+tiêu đề
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