to prove:-

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]

Answered by  | 22nd Feb, 2009, 02:32: PM

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