ПОМОГИТЕ, СРОЧНОО!!! 1) 1+7cos^2(x)=3sin(2x)
2) sin(4x)+sin^2(2x)=0
3) 1-4sin(x)cos(x)+4cos^2(x)=0
2) sin(4x)+sin^2(2x)=0
3) 1-4sin(x)cos(x)+4cos^2(x)=0
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