First slide

Vectors

Question

Three vectors satisfy the relation $\vec{A} . \vec{B} = 0$ and $\vec{A} . \vec{C} = 0.$ Then $\vec{A}$ is parallel to

Moderate

A

$\vec{C}$
B

$\vec{B}$
C

$\vec{B} \times \vec{C}$
D

$\vec{B} . \vec{C}$

Solution

$\vec{A}$ is perpendicular to both $\vec{B}$ and $\vec{C}$ .

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