cos(70)=5/x

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Solution for cos(70)=5/x equation: 


D( x )

x = 0

x = 0

x = 0

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

cos(70) = 5/x // - 5/x

cos(70)-(5/x) = 0

cos(70)-5*x^-1 = 0

-5*x^-1 = -cos(70) // : -5

x^-1 = cos(70)/5

-1 < 0

1/(x^1) = cos(70)/5 // * x^1

1 = (cos(70)/5)*x^1 // : cos(70)/5

5*(cos(70))^-1 = x^1

x = 5*(cos(70))^-1

x = 5*(cos(70))^-1

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