Can someone please explain it to me ASAP?!!! This is Volume by Slicing

general slicing method to find the volume of the following solid. lid whose base is the region bounded by the curve y = 40, cos x and the x-axis on - 2 2. and whose cross sections through the solid perpendicular to the x-axis are les right triangles with a horizontal leg in the xy-plane and a vertical leg above the x-axis. y=401 cos x X the integral that gives the volume of the solid. Use increasing limits of integration. Select the correct choice below and fill in the answer boxes to complete your choice. exact answers.) J ( )dx OB. dy