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JEE Advanced 2026 — Mathematics Vectors & 3D Geometry

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mcq
2026

Question

If vectors $\vec{a} = 2\hat{i} + 3\hat{j} - \hat{k}$ and $\vec{b} = \hat{i} - 2\hat{j} + 3\hat{k}$, then $|\vec{a} \times \vec{b}|$ is:

Options

  1. A

    $\sqrt{99}$

  2. B

    $\sqrt{155}$

  3. C

    $\sqrt{107}$

  4. D

    $\sqrt{83}$

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