Put your functions in the input box[br]Find the intersection of the curves and put your interval on "From" and "to" box[br]enter the value of rotation axis[br]click on play icon, Play the animation, use "Ctrl + F" to refresh or use refresh icon[br]Hover your mounse/figer to 3D graph move it around to observe the solid

Vera Hu-Hyneman, Suffolk County Community College