explain the answer (d) please.
= 3) Convert p=9cos o from spherical to cylindrical coordinates. (a) 2:2 = 9-22 (b) 22 = 81 - 2 (c) 22 = 9 + 912 22 + p2 - 92 = 0 (e) 2 + 72 +9z = 0.