Find the area of the triangle whose vertices are (3,8),(-4,2)and (5,1).
61
64/2
54/2
61/2
A is orthogonal if AAT =
A
I
A-1
|A|I
If any two rows or any two columns are identical or proportional,then value of determinant is _______ .
1
2
3
0
Evaluate
42
44
46
48
cosθ
Determinant of a matrix A -[a11]1x1 is given by _______
a
a11
a12
None of these
16
18
20
22
Evaluate the determinants
5
10
12
A square matrix A is said to be singular if |A|= _____ .
(AB)-1 =
A-1B-1
B-1A-1
B-1/A-1
(AB)T