1. The problem statement, all variables and given/known data Consider a unit sphere centered at the origin. In terms of the Cartesian unit vectors i, j and k, find the unit normal vector on the surface 2. Relevant equations A dot B = AB cos(theta) A cross B = AB (normal vector) sin(theta) Unit sphere radius = 1 3. The attempt at a solution Isn't any direction a normal vector? i x j = + k j x i = - k etc.