Question

If amp(z)=phi then find out amp(-z)

Answer 1

this question is correct

Answer 2

Solution :

--> amp ( -z ) = amp ( z ) = Φ
Reason :

[tex]Let \ z = x+iy \\ =\ \textgreater \ amp(z) = tan^{-1} \frac{y}{x} = \phi \\ \\ =\ \textgreater \ -z = (-x) + i(-y) \\ =\ \textgreater \ amp( -z ) = tan^{-1} \frac{-y}{-x} =tan^{-1} \frac{y}{x} =\phi[/tex]

Hope this helps ^_^