4-1.Complex numbers
medium

यदि $arg\,z < 0$ तब $arg\,( - z) - arg\,(z)$ का मान होगा

A

$\pi $

B

$ - \pi $

C

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

D

$\frac{\pi }{2}$

(IIT-2000)

Solution

(a) $arg  \ z < 0$  अर्थात् ऋणात्मक , $\therefore  arg\ z = -q$

 जहाँ $\theta $ धनात्मक है

 arg $( – z) =  – [ + \pi  – ( – \theta )]$

$ =  – \pi  – \theta  = 2\pi  + ( – \pi  – \theta ) = \pi  + arg(z)$

$ \Rightarrow \,arg\,( – z) – arg(z) = \pi .$   

Standard 11
Mathematics

Similar Questions

Start a Free Trial Now

Confusing about what to choose? Our team will schedule a demo shortly.