In Problems 5-8, sketch the region and then find the vol- ume of the solid whose base is the given region and which has the property that each cross section perpendicular to the x-axis is an equilateral triangle. 5. the region bounded by the circle x2+y2 4 6, the region bounded by the curves y--Ñ " andy x 7. the region bounded above by y vcos and below by the x-axis on the interval-Ï, Ï 8. the triangular region with vertices A(1, 1), B(3, 5), and C (3,-2)
