A×(B×C)+B×(C×A)+C×(A×B)=0

In[77]:=

? Cross

Cross[a, b] gives the vector cross product of a and b. More…

In[78]:=

a  (b  c) + b (ca) + c (ab)

Out[78]=

{0, 0, 0}

Created by Mathematica  (August 6, 2004)