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Решите уравнения
1.[tex]cos^{2} x=\frac{1}{2}[/tex]
2.[tex]3sin^{2}x-cos^{2} x-1=0[/tex]
Решите уравнения
1.[tex]cos^{2} x=\frac{1}{2}[/tex]
2.[tex]3sin^{2}x-cos^{2} x-1=0[/tex]
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