The real part of the complex number is
1/5
-1/5
5
2/5
If Z1=2 + i, Z2 = 3 - 2i and Z3 = -1/2 + √3/2 then the conjugate of z1z2 is
i
8 + i
8 - i
6 - i
If Z is a complex number such that , then
z is purely real
z is purely imaginary
z is any complex number
real part of z is the same as its imaginary part
Let z1 be a complex number with |z1| = 1 and z2 be any complex number, then
0
1
-1
2
The additive inverse of 1 - i is
0 + 0i
-1 + i
None of these
Express in the standard form .
1-3i
1+ 3i
-1-3i
If Z = r (cos θ + i sin θ), then the value of is
cos 2 θ
2 cos 2θ
2 cos θ
2 sin θ
If z is a complex number such that Re(z) = Im (z), then
Re (Z2) = 0
Im (z2) = 0
Re (z2) = Im (z2)
z2 = 0
If Z1 = √2 ( cos π/4) and z2 = √3 (cos π/3 + i sin π/3 ) then |z1z2| is
6
√2
√6
√3
The amplitude of is
π/3
π/4
2 π/3
π/6