13. Which of the following gives the surface area of the solid generated by rotating the region bounded by f (95') = sin(a:) Erom m = 0 to a: = air about the maxis'? A. f1? 2% sin(m)1/ 1 + COS(LE) da: 0 1T B. ] 2w cos(a:) 1 + sin2 (m) dm 0 C. 211' Sin(m)\\/ 1 + (2052(m) d2: o 71' D. / 21min x 1+Sin2 :1: d2: 0 ( W ( ) E. f 7r sin(m) 1 + cos[m) elm n