cos(65)=(7/x)

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Solution for cos(65)=(7/x) equation: 


D( x )

x = 0

x = 0

x = 0

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

cos(65) = 7/x // - 7/x

cos(65)-(7/x) = 0

cos(65)-7*x^-1 = 0

-7*x^-1 = -cos(65) // : -7

x^-1 = cos(65)/7

-1 < 0

1/(x^1) = cos(65)/7 // * x^1

1 = (cos(65)/7)*x^1 // : cos(65)/7

7*(cos(65))^-1 = x^1

x = 7*(cos(65))^-1

x = 7*(cos(65))^-1

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