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:
1