A square matrix [a0] in which a0 = 0 for and a0 = k (constant) for i = j is callled a
unit matrix
scalar matrix
null matrix
diagonal matrix
If A = , then the values of h, a, b are respectively
- 6, - 12, - 18
- 6, 4, 9
- 6, - 4, - 9
- 6, + 12, 18
If is the angle between a and b and , then is equal to
0
D.