The principal value of the amplitude of (1 + i) is
π/2
π/4
π
3π/4
Multiplicative inverse of the non-zero complex number (x + iy), (x,y∈R) is
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
is equal to
i
2i
1 - i
2
-1+√-3 = re iθ,then θ is equal to
2π/3
-2π/3
π/3
-π/3
If ω is a cube root of unity, then arg (ω + ω2) =
If -i + 3 is a root of x2 - 6x + k = 0 then the value of k is
5
√5
√10
10
z z¯= 0 iff
Re(z) = 0
Im(z) = 0
z = 0
none of these
Given x2 + 2 = 0, then x =
√2
±√2 i
-2i
a + ib < c + id ; a,b,c,d ∈ R is meaningful only when
a2 + c2 = 0
b2 + c2
b2 + d2 = 0
a2 + d2 = 0
