Find the angle between the vectors \(\rm \vec a \) and \(\rm \vec b\)
1
\( \rm \sin^{-1}\left(\rm \frac{\vec{a}\cdot\vec{b}}{|a||b|}\right)\)
2
\( \rm \cos^{-1}\left(\rm \frac{\vec{a}\cdot\vec{b}}{|a||b|}\right)\)
3
\( \rm \cos^{-1}\left(\rm \frac{\vec{a}\times\vec{b}}{|a||b|}\right)\)
4
None of the above
5
Question Not Attempted