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Area = ∫cos(3x) dx from 0 to pi/12 = 1/3*sin(3x) eval. from 0 to pi/12
= 1/3*sin(pi/4) - 0 = √2/6
keywords: and,lines,pi,bounded,12,area,axis,exact,Find,cos,by,curve,the,Find the exact area bounded by the curve y=cos3x , the x-axis and the lines x=0 and x= pi/12
