Решите уравнение плизз
2+cos2x=4cos^2x
-sin^2(x)+cos^2(x)+2=4cos^2(x)
cos(2x)+2=2(cos(2x)+1)
cos(2x)=0
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2+cos2x=4cos^2x
-sin^2(x)+cos^2(x)+2=4cos^2(x)
cos(2x)+2=2(cos(2x)+1)
cos(2x)=0