Q6 of 181 Page 1073

If and are perpendicular vectors such that and find the value of

Since a and b vectors are perpendicular .


⇒


Now,


||2 = ||2 + ||2 + 2||||cos


⇒132 = 52 + ||2 + 0 …( cos)


⇒||2 = 169 - 25 = 144


⇒|| = 12


Ans:|| = 12


More from this chapter

All 181 →
4

Find the value of p for which the vectors and are parallel.

 5

Find the value of λ when the projection of on is 4 units.

 7

If is a unit vector such that find

8

Find the sum of the vectors and