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JEE Advanced Mathematics question

MathematicsVector AlgebraJEE Advanced

If and are two perpendicular unit vectors then is equal to

Answer: (D)

Solution

By the vector triple product expansion,

Missing argument for \vec\vec a × (Missing argument for \vec\vec a × Missing argument for \vec\vec b) = (Missing argument for \vec\vec a·Missing argument for \vec\vec b) Missing argument for \vec\vec a -

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Question ID VK-110380