A) 3 unit
B) 9 unit
C) 7 unit
D) 2 unit
Correct Answer: A
Solution :
[a] \[\vec{A}+\vec{B}=4\hat{i}\] \[\vec{A}-\vec{B}=2\hat{j}\] \[\vec{A}=\left( 2\hat{i}+\hat{j} \right)\] \[\vec{B}=\left( 2\hat{i}-\hat{j} \right)\] \[\vec{A}.\vec{B}=3\] unitsYou need to login to perform this action.
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