A) 0.07
B) 0.574
C) 0.111
D) 0.123
Correct Answer: B
Solution :
[b] The resultant vector\[=\left( 3\hat{i}+4\hat{j}+5\hat{k} \right)+\left( 5\hat{i}+3\hat{j}+4\hat{k} \right)=8\hat{i}+7\hat{j}+9\hat{k}\] \[\cos \theta =\frac{8}{\sqrt{{{8}^{2}}+{{7}^{2}}+{{9}^{2}}}}=0.574\]You need to login to perform this action.
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