Cos^2x-1/4=0

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Solution for Cos^2x-1/4=0 equation: 


5*x^4-5*x^5-(5*x^3)+5*x^2-(5*x)+5 = 0

{root[3][0.512]}

-48 = p/6+56

1;6;4;5;1;2

2;0;1;2;4;3

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