In three dimensions, the cross product, notated v×w, is defined as follows (in coordinates): (a,b,c)×(x,y,z)=(bz-cy,cx-az,ay-bx) A useful fact about the cross product is that v×w is
a) A scalar.
b) Directed along the z-axis.
c) Orthogonal to both v and w.
d) Parallel to both v and w.