Cos(23)=18/x

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Solution for Cos(23)=18/x equation: 


D( x )

x = 0

x = 0

x = 0

x in (-oo:0) U (0:+oo)

cos(23) = 18/x // - 18/x

cos(23)-(18/x) = 0

cos(23)-18*x^-1 = 0

-18*x^-1 = -cos(23) // : -18

x^-1 = cos(23)/18

-1 < 0

1/(x^1) = cos(23)/18 // * x^1

1 = (cos(23)/18)*x^1 // : cos(23)/18

18*(cos(23))^-1 = x^1

x = 18*(cos(23))^-1

x = 18*(cos(23))^-1

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