Cos(72)=250/x

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Solution for Cos(72)=250/x equation: 


D( x )

x = 0

x = 0

x = 0

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

cos(72) = 250/x // - 250/x

cos(72)-(250/x) = 0

cos(72)-250*x^-1 = 0

-250*x^-1 = -cos(72) // : -250

x^-1 = cos(72)/250

-1 < 0

1/(x^1) = cos(72)/250 // * x^1

1 = (cos(72)/250)*x^1 // : cos(72)/250

250*(cos(72))^-1 = x^1

x = 250*(cos(72))^-1

x = 250*(cos(72))^-1

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