Q. If $ar g (z) < 0$ , then $ar g (- z) - ar g (z) =$

86 167 Complex Numbers and Quadratic Equations Report Error

A

$π$

B

$- π$

C

$- \frac{π}{2}$

D

$\frac{π}{2}$

Solution:

$- θ = ar g (z) < 0$
$ar g (- z) = π - θ$
$\Rightarrow ar g (- z) - ar g (z) = π - θ - (- θ) = π$