<prompt> Acha mathbfa anzepmatrix 4 sqrtpi -14 mwishopmatrix na mathbfb anzapmatrix -1 3 10 mwishopmatrix. Kokotoa mathbfa cdot mathbfa nyakati mathbfb.  <response>: Vekta mathbfa na mathbfa times mathbfb daima ni orthogonal, kwa hivyo bidhaa zao za nukta ni 0. 