If $z$ and $\omega $ are two non-zero complex numbers such that $|z\omega |\, = 1$ and $arg(z) - arg(\omega ) = \frac{\pi }{2},$ then $\bar z\omega $ is equal to
$1$
$-1$
$i$
$-i$
The inequality $|z - 4|\, < \,|\,z - 2|$represents the region given by
Let $z$ =${i^{2i}}$ , then $|z|$ is (where $i$ =$\sqrt { - 1}$ )
If $\frac{{z - i}}{{z + i}}(z \ne - i)$ is a purely imaginary number, then $z.\bar z$ is equal to
If $arg\, z < 0$ then $arg\, (-z)\, -arg(z)$ is equal to
If the conjugate of $(x + iy)(1 - 2i)$ be $1 + i$, then