Pythagorean Identity

Geometry Level 2

Use the Pythagorean identity sin2(x)+cos2(x)=1\sin^2(x) + \cos^2(x) = 1 to find the value of cos(x)\cos(x) if sin2(x)+2cos(x)2=0\sin^2(x) + 2\cos(x) - 2 = 0. Enter your answer as the value of cos(x)\cos(x).

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