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A, B, C, D, E, F in that order, are the vertices of a regular hexagon with centre orgin. If the position vectors of the vertices A and B are respectively, 4hati+3hatj-hatk and -3hati+hatj+hatk, then DE is equal to |
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Answer» `7hati+2hatj-2hatk` `OB=-3hati+hatj+hatk` Now, `AB=OB-OA=-7hati-2hatj+2hatk` `THEREFORE DE=-AB=7hati+2hatj-2hatk` |
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