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(d)Let $z = 0 + ib$, where $b < 0$. Then $z$ is represented by a point on $OY'$ (negative direction of $y - $axis), therefore $arg(z) = - \frac

Vedclass · Accepted Answer

$ - \frac{\pi }{2}$

Vedclass · Answer

(d)Let $z = 0 + ib$, where $b < 0$. Then $z$ is represented by a point on $OY'$ (negative direction of $y - $axis), therefore $arg(z) = - \frac{\pi }{2}$.

Let $z$ be a purely imaginary number such that ${\mathop{\rm Im}\nolimits} (z) < 0$. Then $arg\,(z)$ is equal to

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