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Multiplication with Vectors

If P. Q = P...

Question

If $\to P . \to Q = P Q$ , then angle between $\to P$ and $\to Q$ is :

A

0^{\circ}

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B

30^{\circ}

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C

45^{\circ}

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D

60^{\circ}

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Solution

The correct option is A $0^{\circ}$
$c o s θ = \frac{\to P . \to Q}{P Q} = 1$
Thus, $θ = 0^{0}$

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