cos(65)=x/15

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Solution for cos(65)=x/15 equation: 


x in (-oo:+oo)

cos(65) = x/15 // - x/15

cos(65)-(x/15) = 0

cos(65)-1/15*x = 0 // - cos(65)

-1/15*x = -cos(65) // : -1/15

x = -cos(65)/(-1/15)

x = 15*cos(65)

x = 15*cos(65)

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