cos(45)=x/3.1

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Solution for cos(45)=x/3.1 equation: 


x in (-oo:+oo)

cos(45) = x/3.1 // - x/3.1

cos(45)-(x/3.1) = 0

cos(45)-0.32258065*x = 0

cos(45)-0.32258065*x = 0 // - cos(45)

-0.32258065*x = -cos(45) // : -0.32258065

x = -cos(45)/(-0.32258065)

x = 3.09999995*cos(45)

x = 3.09999995*cos(45)

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