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[" 8.If "x in(pi,(3 pi)/(2))" then "4cos...

[" 8.If "x in(pi,(3 pi)/(2))" then "4cos^(2)((pi)/(4)-(x)/(2))+sqrt(4sin^(4)x+sin^(2)2x)" is always equal to "],[[" (A) "1," (B) "2," (C) "-2," (D) none of these "]]

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