Cos(39)=d/39

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Solution for Cos(39)=d/39 equation: 


d in (-oo:+oo)

cos(39) = d/39 // - d/39

cos(39)-(d/39) = 0

cos(39)-1/39*d = 0 // - cos(39)

-1/39*d = -cos(39) // : -1/39

d = -cos(39)/(-1/39)

d = 39*cos(39)

d = 39*cos(39)

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