question:Vector A lies in the xy plane, has a magnitude of 18 units and points in a direction 250° from the +x direction. Vector B has a magnitude of 12 units and points in the +z direction. What is the vector product of C=AxB
answer:C=216 units and points 160° from positive x axis
confusion: I'm stuck with the angle part, why wouldn't it still be 250° in x direction and coming out of the page? I also considered arccos(12/18) but that's no good.