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The angle between vector (overset(rarr)A...

The angle between vector `(overset(rarr)Axxoverset(rarr)B)` and `(overset(rarr)B xx overset(rarr)A)` is :

A

q q,r,s r s

B

q p,q,r,s s,s

C

q p,q,r,s r s

D

q r r s

Text Solution

Verified by Experts

The correct Answer is:
c
`|bar A xx barB| =sqrt(3)(barA. barB) rarr AB sin theta =sqrt(3) AB cos theta rarr theta =pi//3`
`|bar A+barB|=|barB.barA` for any angle b/w `barA & barB`
also `|barA | +|bar B|=|barc| rarr A^(2)+B^(2)+2AB =c^(2) rarr cos theta =1 rarr theta =0^(@) rarr D-s `n
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