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" 12."[sin(x)/(2)+cos(x)/(2)]^(2)...

" 12."[sin(x)/(2)+cos(x)/(2)]^(2)

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The value of (cos^(4)x+cos^(2)x sin^(2) x + sin^(2)x)/(cos^(2)x+ sin^(2) x cos^(2) x + sin^(4)x) is ____________