If \(0\cdot 4\hat{i}+0\cdot 7\hat{j}+c\hat{k}\) is a unit vector, then the value of \(c\) is
Answer & explanation
Correct answer: option 1
\(\begin{aligned}\sqrt{(0.4)6{2}+(0.7)^{2}+c^{2}}&=1\\ c&=\sqrt{0.35}\end{aligned}\)
If \(0\cdot 4\hat{i}+0\cdot 7\hat{j}+c\hat{k}\) is a unit vector, then the value of \(c\) is
Correct answer: option 1