3-1.Vectors
easy

यदि $\mathop P\limits^ \to .\mathop Q\limits^ \to = PQ,$ तो $\mathop P\limits^ \to $ तथा $\mathop Q\limits^ \to $ के बीच कोण ....... $^o$ है

A

$0$

B

$30$

C

$45$

D

$60$

(AIIMS-1999)

Solution

(a) $\cos \theta = \frac{{\mathop P\limits^ \to .\mathop Q\limits^ \to }}{{PQ}} = 1$

$⇒$ $\theta = 0^\circ $

Standard 11
Physics

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