Q13 of 181 Page 1073

Find a vector in the direction of which has magnitude 21 units.

|| = (2² + ( - 3)² + 6²)^1/2

⇒|| = (4 + 9 + 36)^1/2 = (49)^1/2 = 7

a unit vector in the direction of the sum of the vectors is given by:

a vector in the direction of which has magnitude 21 units.

= 21

Ans:

Write the projection of the vector on the vector

Find when and

If and are such that is perpendicular to then find the value of λ.

Write the vector of magnitude 15 units in the direction of vector