[" If "cos((pi)/(4)-x)cos2x+sin x sin2x ...

[" If "cos((pi)/(4)-x)cos2x+sin x sin2x sec x=],[cos x sin2x sec x+cos((pi)/(4)+x)cos(2x)" then possible "],[" value of "cos^(2)x+sec^(2)x" is equal to "]

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