$\vec{C}$ is parallel to both $\vec{A}$ and $\vec{B}$

$\vec{C}$ is perpendicular to both $\vec{A}$ and $\vec{B}$

$\vec{C}$ is coplanar with $\vec{A}$ and $\vec{B}$

$\vec{C}$ is equal to $\vec{A} + \vec{B}$

$\hat A = \hat B$

$\hat A.\hat B = {\rm{AB}}$

$\left| {{\rm{\vec A}}} \right| = \left| {{\rm{\vec B}}} \right|$

${\rm{A\hat B}}\left| {\rm{\;}} \right|{\rm{\;B\hat A}}$

$\hat A = \hat B$

$\hat A.\hat B = {\rm{AB}}$

$\left| {{\rm{\vec A}}} \right| = \left| {{\rm{\vec B}}} \right|$

${\rm{A\hat B}}\left| {\rm{\;}} \right|{\rm{\;B\hat A}}$

${60^0}$

${120^0}$

${0^0}$

${180^0}$