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If the absolute value of the integral I=π/2∫π/4x⋅cos2x⋅cosxsin7xdx in the lowest form is ab, where a,b∈N, then the value of (a+b) is

Answer» If the absolute value of the integral I=π/2π/4xcos2xcosxsin7xdx in the lowest form is ab, where a,bN, then the value of (a+b) is


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