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CBSE Class 12-science Answered

to prove:-
Asked by | 20 Feb, 2009, 05:13: PM
answered-by-expert 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 | 22 Feb, 2009, 02:32: PM

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