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JEE Advanced Mathematics question

MathematicsVector AlgebraJEE Advanced

If are three vectors of equal magnitude and the angle between each pair of vectors is such that then is equal to

Answer: (C)

Solution

Let . Each pairwise dot product is . So

6 = |Missing argument for \vec\vec a + Missing argument for \vec\vec b + Missing argument for \vec\vec c|^2 =

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Question ID VK-109634