cos(55)=x/15

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Solution for cos(55)=x/15 equation: 


x in (-oo:+oo)

cos(55) = x/15 // - x/15

cos(55)-(x/15) = 0

cos(55)-1/15*x = 0 // - cos(55)

-1/15*x = -cos(55) // : -1/15

x = -cos(55)/(-1/15)

x = 15*cos(55)

x = 15*cos(55)

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