The length of the generatrix of the cone is 4, and the area of the cross-section triangle passing through the vertex is 4 root sign 3. Find the vertex angle of the cross-section triangle (2), the height of the cone is l, and the bottom radius is root sign 3 Find the maximum cross-sectional area of a cone vertex

The length of the generatrix of the cone is 4, and the area of the cross-section triangle passing through the vertex is 4 root sign 3. Find the vertex angle of the cross-section triangle (2), the height of the cone is l, and the bottom radius is root sign 3 Find the maximum cross-sectional area of a cone vertex

Let H be the high position and R be the radius
Area of cross section triangle = R * H = 4sqrt (3), sqrt (R ^ 2 + H ^ 2) = 4
R^2 + H^2 = 16
RH = 4sqrt(3)
R = 2, H = 2sqrt (3), vertex angle = 60 degrees
R = 2sqrt (3), H = 2, vertex angle = 120 degrees