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If arg(z) lt 0, then find arg(-z) -ar...

If ` arg(z) lt 0, ` then find ` arg(-z) -arg(z)`.

A

`pi`

B

`-pi`

C

`pi/2`

D

`pi/2`

Text Solution

Verified by Experts

The correct Answer is:
A
Let arg(z) =-0 where `theta gt 0` ltgtgt It is evident from the figure that
`therefore "arg"(-z)-"arg"(z) = pi-theta-(-theta)=pi`
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