Q27 of 138 Page 24

For what value of λ are the vectors perpendicular to each other?

Let

for to be perpendicular to

i.e. [vector dot product]

(2).()=0

2-2+3=0

5-2=0

Hence, =

If are mutually perpendicular unit vectors, write the value of

Find the angle between the vectors

Find the projection of

Write the value of p for which are parallel vectors.