Direction cosines of vector a=i+j-2 k will be ___________ . - Vidyadip

Question

Direction cosines of vector $\vec{a}=\hat{i}+\hat{j}-2 \hat{k}$ will be ___________ .

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Answer

$\frac{1}{\sqrt{6}}, \frac{1}{\sqrt{6}}, \frac{-2}{\sqrt{6}}$

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