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If $\bar{u}, \bar{v}$ are two vectors represented in the following figure, then the value of $|\bar{u} \times \bar{v}|=$
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The correct answer is:
$10$
$\vec{u} \times \vec{v}|=| \vec{u}|| \vec{v} \mid \sin \theta=4 \times 5 \times \sin 150^{\circ}=20 \times \frac{1}{2}=10$
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