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Solve the following.
Find the angle between the vectors , .
Find the angle between the vectors $\vec{a} = 6\hat{i} + 2\hat{j} + 3\hat{k}$, $\vec{b} = 2\hat{i} - 9\hat{j} + 6\hat{k}$.
Answer
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From ISC 2021 Specimen Mathematics Paper 1, question 15(iii).
Check your working with the 3D geometry and vectors calculator: points, vectors, lines and planes: distances, angles, foot and image, shortest distance, intersections.