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Questions  

The angle between two vectors A and B is 120then its resultant C will be  

a
C=|A→−B→|
b
C>|A→−B→|
c
C=-A→+B→
d
C<|A→−B→|

detailed solution

Correct option is D

C=A2+B2+2ABcos1200=A2+B2-AB and A→-B→=A2+B2-2ABcos1200=A2+B2+AB Comparing them , we can say C<|A→−B→|

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