5
5hienbede


[tex]1) 3cos^2x+2sin^2x=3cosx+2sinx[/tex]
[tex]2) 3(1+\frac{cos2x}{cos^2x})^4+tan^6x=7[/tex]
[tex]2) 3(1+\frac{cos2x}{cos^2x})^4+tan^6x=7[/tex]
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