find u X v and show that it is orthogonal to both u and v. u= 6k v=-i + 3j + k http://s763.photobucket.com/albums/xx275/trinhkieu888/?action=view¤t=666.jpg This is what I got from the picture, but my teacher said that I have one more step to do to show that they are orthogonal, I need to do uxv uxw = (0*-18)+(0*-6)+(6*0)= ? and also vxw=? If both are zero, the vectors are orthogonal. But my problem is I don't know how to find w. Can any one please explain it to me? Thank you very much!