to prove:-

Q: to prove:-

Beginning with the ubiquitous triple product identity Ax(BxC) = B(A.C)-C(A.B) (1) for vectors in R^3, we immediately have the handy formula for the cross product of two cross products (AxB)x(CxD) = B[(CxD).A] - A[(CxD).B]

Asked by | 20th Feb, 2009, 05:13: PM

Expert Answer:

Beginning with the ubiquitous triple product identity

               Ax(BxC) = B(A.C)-C(A.B)                       (1)

for vectors in R^3, we immediately have the handy formula for the 
cross product of two cross products

        (AxB)x(CxD)  =  B[(CxD).A]  -  A[(CxD).B]