Show that if , then  where  are the three vectors lying on the plane.
Here, Â Â
    Â
i.e., Â Â
   Â
  Â
   Â
Hence, Â
Here, we haveÂ
x = 12 m ; y = 5 m ; z = 6m
Then, resultant vector is given by,Â
r = (x2 + y2 + z2 )Â 1/2
  = ( 122 + 52 + 62)1/2
  = (205)1/2
  = 14.31 mÂ
Find the angle between the vectors:Â
 andÂ
Angle between the vectors is given by,Â
Â
That is  = cos-1Â
This implies,Â
 = 600