(a + b + c)
(a + b + c)2
(a + b + c)3
(a + b + c) (ab + bc + ca)
None of these
The type of the matrix is
a scalar matrix
a diagonal matrix
a unit matrix
diagonal and scalar
± 3
± 9
± 6
± 7
Sin(x - y)
Cos(x - y)
Cos(x + y)
Sin(x + y)
3I
5I
-5I
-3I
The roots of equation are
0, 12, 12
0, 12, -12
0, 12, 16
0, 9, 16
If AB = C then matrix A,B,C are
A2×3, B3×2, C2×3
A3×2, B2×3, C3×2
A3×3, B2×3, C3×3
A3×2, B2×3, C3×3
, then A2 =
null matrix
unit matrix
A
2A