vectors

Question: The position vectors of points A, B, C and D are $A = 3\hat i + 4\hat j + 5\hat k,\,\,B = 4\hat i + 5\hat j + 6\hat k,\,\,C = 7\hat i + 9\hat j + 3\hat k$ and $D = 4\hat i + 6\hat j$ then the displacement vectors AB and CD are



1) Perpendicular
2) Parallel
3) Antiparallel
4) Inclined at an angle of 60°
Solution: Explanation: explanation
multiplication-of-vectors

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