Washer method is an extension of the Disk method for finding the volumes of more elaborate solids of revolution.
5311_Generalizing_the_washer_method.html
5310_Disk_method_for_rotation_around_x_axis.html
5313_Part_2_of_washer_for_non_axis_rotation.html
5315_Evaluating_the_integral_for_washer_method.html
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