Find the unit vector in the direction of vector \(\rm \vec{a}= 3\hat i -4\hat j+12\hat k\)

\(\rm \frac{3}{13} \hat i + \frac{4}{13} \hat j - \frac{12}{13} \hat k\)

\(\rm \frac{3}{13} \hat i + \frac{4}{13} \hat j + \frac{12}{13} \hat k\)

\(\frac{1}{9} \hat i - \frac{4}{9} \hat j + \frac{8}{9} \hat k\)

\(\rm \frac{3}{13} \hat i - \frac{4}{13} \hat j + \frac{12}{13} \hat k\)

Find the unit vector in the direction of vector \(\rm \vec{a}= 3\hat

1.	Find the unit vector in the direction of vector \(\rm \vec{a}= 3\hat i -4\hat j+12\hat k\)
A.	\(\rm \frac{3}{13} \hat i + \frac{4}{13} \hat j + \frac{12}{13} \hat k\)
B.	\(\frac{1}{9} \hat i - \frac{4}{9} \hat j + \frac{8}{9} \hat k\)
C.	\(\rm \frac{3}{13} \hat i - \frac{4}{13} \hat j + \frac{12}{13} \hat k\)
D.	\(\rm \frac{3}{13} \hat i + \frac{4}{13} \hat j - \frac{12}{13} \hat k\)
Answer» D. \(\rm \frac{3}{13} \hat i + \frac{4}{13} \hat j - \frac{12}{13} \hat k\)