Prove that if A and B are any nonzero vectors and C: lBlA + lAlB, then the angle between A and C has the same measure as the angle between B and C such that A=(a1,a2,a3); B=(b1,b2,b3); IAI=(a12 ,a22 ,a32 ); IBI=(b12 ,b22 ,b32 ).

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A: The required angle is, option (b) π/2 The detailed solution is as follows below:

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Q: u = 57 - 5] + k and 7 = 27 + 14k.

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