If $\overrightarrow{A} \times \overrightarrow{B} = \overrightarrow{B} \times \overrightarrow{A}$,then the angle between $\overrightarrow{A}$ and $\overrightarrow{B}$ is

  • A
    $\pi / 2$
  • B
    $\pi / 3$
  • C
    $\pi$
  • D
    $\pi / 4$

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What is the value of $(\vec{A} + \vec{B}) \cdot (\vec{A} \times \vec{B})$?

Vector $A$ is pointing eastwards and vector $B$ is pointing northwards. Match the following two columns:
Column $I$ Column $II$
$(A) (A+B)$ $(p)$ North-east
$(B) (A-B)$ $(q)$ Vertically upwards
$(C) (A \times B)$ $(r)$ Vertically downwards
$(D) (A \times B) \times (A \times B)$ $(s)$ None

Let $\vec{P} = P \sin \theta \hat{i} - P \cos \theta \hat{j}$ be any vector. Another vector $\vec{Q}$ which is perpendicular to $\vec{P}$ is

If $\overrightarrow A = 3\hat i + \hat j + 2\hat k$ and $\overrightarrow B = 2\hat i - 2\hat j + 4\hat k$,then the value of $|\overrightarrow A \times \overrightarrow B |$ will be:

$\hat{i} \cdot (\hat{j} \times \hat{k}) + \hat{j} \cdot (\hat{k} \times \hat{i}) + \hat{k} \cdot (\hat{i} \times \hat{j}) = $

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