Consider the vectors    and  .

If is perpendicular to , then possible values for are

1. and
2. and
3. and
4. and
5. and

Let    and  .

If is a unit vector such that    and  , then    is equal to

1. 2
2. 3
3. 4
4. 5
5. 6

The vectors    and    are perpendicular for

1.   and 
2.   and 
3.   and 
4.   and 
5.   and 

Two vectors are given by    and  , where  , .

If    and    is perpendicular to  , then and respectively are

If    and  , where    is a real constant, the vector    will be perpendicular to vector    where    equals

A.   0 only

B.   2 only

C.   0 or 2

D.   4.5

E.   0 or −2