3-1.Vectors
easy

જો $\overrightarrow P .\overrightarrow Q = PQ,$ તો $\overrightarrow P $ અને $\overrightarrow Q $ બંને વચ્ચે નો ખૂણો ....... $^o$ હશે.

A

$0$

B

$30$

C

$45$

D

$60$

(AIIMS-1999)

Solution

(a) $\cos \theta = \frac{{\vec P.\vec Q}}{{PQ}} = 1$ 

$\theta = 0^\circ $

Standard 11
Physics

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