A) \[\frac{5}{\sqrt{2}}\]
B) \[10\sqrt{2}\]
C) \[5\sqrt{2}\]
D) 5
Correct Answer: A
Solution :
\[\frac{\overrightarrow{A}.\overrightarrow{B}}{|\vec{i}+\vec{j}|}=\frac{(2\hat{i}+3\hat{j})\,(\hat{i}+\hat{j})}{\sqrt{2}}\]\[=\frac{2+3}{\sqrt{2}}=\frac{5}{\sqrt{2}}\]You need to login to perform this action.
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