f(x)=1/2cos2x

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Solution for f(x)=1/2cos2x equation: 


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2*y-4*x-10;5*x+3*y-15

{root[2][69]}

2*y-4*x-10;5*x+3*y-15

(3-8^(1/2))^(1/2)+(5-24^(1/2))^(1/2)+(7-48^(1/2))^(1/2) = 1

(3-8^(1/2))^(1/2) = 0

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