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JEE Advanced Mathematics question

MathematicsVector AlgebraJEE Advanced

Let and . If is a vector such that , and the angle between and is then is equal to

Answer: (B)

Solution

Missing argument for \vec\vec a×Missing argument for \vec\vec b==2Missing argument for \hat\hat i-2Missing argument for \hat\hat j+Missing argument for \hat\hat k, |Missing argument for \vec\vec a×Missing argument for \vec\vec b|==3 .

Hence , so we only need \vec$

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Question ID VK-109682