Cos(45)=8/x

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Solution for Cos(45)=8/x equation: 


D( x )

x = 0

x = 0

x = 0

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

cos(45) = 8/x // - 8/x

cos(45)-(8/x) = 0

cos(45)-8*x^-1 = 0

-8*x^-1 = -cos(45) // : -8

x^-1 = cos(45)/8

-1 < 0

1/(x^1) = cos(45)/8 // * x^1

1 = (cos(45)/8)*x^1 // : cos(45)/8

8*(cos(45))^-1 = x^1

x = 8*(cos(45))^-1

x = 8*(cos(45))^-1

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