10
8
6
none of these
The principal value of the amplitude of (1 + i) is
π/2
π/4
π
3π/4
If x = cosθ + i sinθ then the value of xn + 1/xn is
2 cos n θ
2 i sin n θ
2 sin n θ
2 i cos n θ
The complex number 1 + 2i/1 - i lies in
First quadrant
Second quadrant
Third quadrant
Fourth quadrant
The reciprocal of 3 +i √7 i is
3/4 - √7/4 i
3 - √7 i
3/16 - √7/16 i
√7+3 i
If -i + 3 is a root of x2 - 6x + k = 0 then the value of k is
5
√5
√10
The modulus and the principal amplitude of (1 + i√3)2respectively are
2,π/2
4,2π/3
5/8,tan-1(-4/3)
4 -3π/4
Multiplicative inverse of the non-zero complex number (x + iy), (x,y∈R) is
The value of (i)243 is equal to
i
-i
-1
1
Given x2 + 2 = 0, then x =
2
√2
±√2 i
-2i
