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JEE Advanced Mathematics question

MathematicsVector AlgebraJEE Advanced

If , and are unit coplanar vectors then the scalar triple product is equal to

Answer: (A)

Solution

For vectors that are linear combinations of , the triple product equals (determinant of the coefficients) :

[2Missing argument for \vec\vec a - Missing argument for \vec\vec b 2Missing argument for \vec\vec b - Missing argument for \vec\vec c 2Missing argument for \vec\vec c - Missing argument for \vec\vec a] = Missing \end{vmatrix}\begin{vmatrix} 2 & -1 &

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Question ID VK-110501