1.

If hati+hatj+hatk,2hati+5hatj,3hati+2hatj-3hatk and hati-6hatj-hatk are the position vectors of points A, B, C and D respectively, then find the angle between vec(AB) and vec(CD). Deduce that vec(AB) and vec(CD) are collinear.

Answer»


Answer :SINCE `0LE theta LE pi`, it FOLLOWS that `theta=pi`. This show that `vec(AB)` and `vec(CD)` are COLLINEAR.


Discussion

No Comment Found

Related InterviewSolutions