The angle between two vectors \(\vec A\) and \(\vec B\) given by-
1
\(cos\;\theta = \frac{{\vec A.\vec B}}{2{\left| {\vec A} \right|\left| {\vec B} \right|}}\)
2
\(tan\;\theta = \frac{{\vec A.\vec B}}{{\left| {\vec A} \right|\left| {\vec B} \right|}}\)
3
\(sin\;\theta = \frac{{\vec A.\vec B}}{{\left| {\vec A} \right|\left| {\vec B} \right|}}\)
4
\(cos\;\theta = \frac{{\vec A.\vec B}}{{\left| {\vec A} \right|\left| {\vec B} \right|}}\)