Find the angle θ between vectors u and v, where u = (6 , 3) and v = (-4, 3)
1
\(cos^{-1}\left ( \frac{-3}{\sqrt{5}} \right )\)
2
\(cos^{-1}\left ( \frac{-6}{\sqrt{5}} \right )\)
3
\(cos^{-1}\left ( \frac{-15}{\sqrt{5}} \right )\)
4
\(cos^{-1}\left ( \frac{-1}{\sqrt{5}} \right )\)