Vectors Question 157

In a clockwise system

[CPMT 1990]

Options:

A) $ 30{}^\circ $

B) $ 45{}^\circ $

C) $ 60{}^\circ $

D) $ 90{}^\circ $

Show Answer

Answer:

Correct Answer: B

Solution:

$ |\vec{A}\times \vec{B}|,=\vec{A}|\vec{B}|\sin\theta$

Therefore $ AB\sin \theta = AB\cos \theta $

Therefore $ \tan \theta =1 $ \quad $ \theta =45{}^\circ $



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