Practicing Success
If vectors \(\vec{a}\)= 3\(\hat{i}\) + 5 \(\hat{j}\)-7\(\hat{k}\) and \(\vec{b}\) = \(\hat{i}\)- 2 \(\hat{j}\) - 9\(\hat{k}\) then find the magnitude of vector (\(\vec{a}\) - \(\vec{b}\) )
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- √57 √58 √57 √59 |
√57 |
We have vectors \(\vec{a}\)= 3\(\hat{i}\) + 5 \(\hat{j}\)-7\(\hat{k}\) and \(\vec{b}\) = \(\hat{i}\)- 2 \(\hat{j}\) - 9\(\hat{k}\) then find the magnitude of vector ( \(\vec{a}\) - \(\vec{b}\)) = |{(3\(\hat{i}\) + 5 \(\hat{j}\)-7\(\hat{k}\)) -(\(\hat{i}\)- 2 \(\hat{j}\) - 9\(\hat{k}\))}| = |{2\(\hat{i}\)+ 7\(\hat{j}\) +2\(\hat{k}\))}| = √(2)2 +(7)2 +(2)2 = √57 |