A) 1/7
B) \[-1/7\]
C) 7
D) \[-7\]
E) 1
Correct Answer: B
Solution :
The projection of \[\hat{i}+3\hat{j}+\hat{k}\]on \[2\hat{i}-3\hat{j}+6\hat{k}\] \[=\frac{(\hat{i}+3\hat{j}+\hat{k}).(2\hat{i}-3\hat{j}+6\hat{k})}{\sqrt{4+9+36}}\] \[=\frac{2-9+6}{\sqrt{49}}=-\frac{1}{7}\]You need to login to perform this action.
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