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[" Let "f(x)=|[2cos^(2)x,sin2x,-sin x],[...

[" Let "f(x)=|[2cos^(2)x,sin2x,-sin x],[sin2x,2sin^(2)x,cos x],[sin x,-cos x,0]|," the value of "int_(0)^( pi/2){f(x)+f'(x)}dx," is "],[[" (a) "(pi)/(2)," (b) "pi," (c) "3 pi]]

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