Cos40=16/x

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Solution for Cos40=16/x equation:


(-x^4-3*36*x^2)/((x^2-36)^2) = 0

3*x = 45/x-2

(x^-5)/(c^-7) = 0

48-39 = x/9

(61/8)/(-7/9) = 0

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