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- solve for the intergral of (2sinx)/(1+cos^2x)dxA rectangle is to be inscribed under the arch of the curve y = 4 cos (0.5x) from x = -π to x = π. What are the dimensions of the rectangle with largest area, and what is the largest area?A rectangle is to be inscribed under the arch of the curve y = 4 cos (0.5x) from x = -pai to x = pai. What are the dimensions of the rectangle with largest area, and what is the largest area?