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01699895843


.....[tex]2sin^6x+sin^4x+cos2x=25[/tex]
.....[tex]cos4x/3=cos^2x[/tex]
.....[tex]2cos^23x/5+1=3cos4x/5[/tex]
chú ý tex+tiêu đề
.....[tex]cos4x/3=cos^2x[/tex]
.....[tex]2cos^23x/5+1=3cos4x/5[/tex]
chú ý tex+tiêu đề
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