Recent content by shunae95

  1. S

    Volume of solid from revolving region between cos x and -cos x about y=2π

    2π∫π/2 0 (2π+cosx)2−(2π−cosx)2dx 2π∫π/2 (2π+cos⁡x)2−(2π−cos⁡x)2dx16π2∫π/20cosxdx 16π2∫0π/2cos⁡xdx16π2[sinx]π/20=16π2
  2. S

    Volume of solid from revolving region between cos x and -cos x about y=2π

    Find the volume of the solid generated by revolving the region enclosed by y= cos x and y = -cos x for [-pi/2, pi/2] about the line y=2pi.