Notes

Properties of Scalar or Dot Product in Vectors…

Properties of Scalar or Dot Product in Vectors:
(a) i.i = j.j = k.k = 1, because angle between two equal vectors is zero.
(b) If two vectors A and B are perpendicular vectors, then A.B = ABcos90° = 0 and i.j = j.k = k.i = 0
(c) for two vectors
A = a_xi + a_yj + a_zk and B = b_xi + b_yj + b_zk
A.B = a_xb_x + a_yb_y + a_zb_z