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Решите уравнение:


1) 3co[tex]s^{2}[/tex]x – 5cosx– 2 = 0;




2) 6si[tex]n^{2}[/tex]x – 1,5sin2x – 5co[tex]s^{2}[/tex]x = 2 ;




3)√3 sin2x + cos5x – cos9x = 0.
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