Mathematics · 2019
JEE Main · 8 April 2019, Shift 1 · Q85
The magnitude of the projection of the vector 2 i +3 j + k on the vector perpendicular to the plane containing the vectors i + j + k and i +2 j +3 k,…
The magnitude of the projection of the vector $\displaystyle 2 \hat{i}+3 \hat{j}+\hat{k}$ on the vector perpendicular to the plane containing the vectors $\displaystyle \hat{i}+\hat{j}+\hat{k}$ and $\displaystyle \hat{i}+2 \hat{j}+3 \hat{k}$, is:
Official answer
(4)
$\displaystyle \sqrt{\frac{3}{2}}$
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JEE Main 2019 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.