If 
and 
find the angle between 
and 
Given
,
and
Let the angle between vectors
and
be θ.
We know the cross product of two vectors 
and 
forming an angle θ is
where 
is a unit vector perpendicular to
and 
is a unit vector 
Recall the magnitude of the vector 
is
⇒ 14 sin θ = 7
Thus, the angle between two vectors is
.
16