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 x^{n} + 1/x^{n} is
2 cos n θ
2 i sin n θ
2 sin n θ
2 i cos n θ
The modulus and the principal amplitude of (1 + i√3)^{2}respectively are
2,π/2
4,2π/3
5/8,tan^{-1}(-4/3)
4 -3π/4
The complex number 1 + 2i/1 - i lies in
First quadrant
Second quadrant
Third quadrant
Fourth quadrant
10
8
6
none of these
The principal value of argument of 1 + i is
π/3
If -i + 3 is a root of x^{2} - 6x + k = 0 then the value of k is
5
√5
√10
z z¯= 0 iff
Re(z) = 0
Im(z) = 0
z = 0
The equation having 4 - 3i and 4 + 3i as roots is
x^{2} + 8x + 25 = 0
x^{2} + 8x - 25 = 0
x^{2} - 8x + 25 = 0
x^{2} - 8x - 25 = 0
If ω is a cube root of unity, then arg (ω + ω^{2}) =