If find the value of so that is perpendicular to .
Let and Find such that and are orthogonal .
Find if the vectors and are orthogonal.
If such that is perpendicular to , then find the value of
If find the angle between
If are two vectors such that find the angle between .
Find the angle between two vectors with magnitudes 2 and 1 respectively, and such that
Find the angle between two vectors with magnitudes