Question

  Решить уравнение:
3sin^2(x)+sin(x)*cos(x)=2cos^2(x) 
 2cos^2(x)-3sin(x)*cos(x)+sin^2(x)=0.
 9sin(x)cos(x)-7cos^2(x)=2sin^2(x)


 2sin^2(x)-sin(x)cos(x)=cos^2(x)

Answer 1

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