(B) Let $z = 0 + ib$,where $b > 0$.Since $z$ is purely imaginary and its imaginary part is positive,it lies on the positive $y$-axis in the complex pl

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(B) Let $z = 0 + ib$,where $b > 0$.Since $z$ is purely imaginary and its imaginary part is positive,it lies on the positive $y$-axis in the complex plane.The argument of any complex number lying on the positive $y$-axis is $\frac{\pi}{2}$.

Class 11 Mathematics 4-1.Complex numbers Argument of complex numbers

Medium

Let $z$ be a purely imaginary number such that $\text{Im}(z) > 0$. Then $\text{arg}(z)$ is equal to

A
$\pi$
B
$\frac{\pi}{2}$
C
$0$
D
$-\frac{\pi}{2}$

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4-1.Complex numbers

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Argument of complex numbers

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Let $z$ be a purely imaginary number such that $\text{Im}(z) > 0$. Then $\text{arg}(z)$ is equal to

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