Complex Numbers Moduli Problem

[SamitC]

Homework Statement

I am not able to understand an example from Brown-Churchill book. I have provided the screenshot in the attached picture. Request help.

Homework Equations

No

The Attempt at a Solution

No

 

[BvU]

Let me guess: the triangle thing has something like $|\vec a+\vec b|\le |\vec a|+|\vec b|$ ?
And how does that tranlate to complexe numbers ?

 

[SamitC]

Solved: https://www.physicsforums.com/threads/complex-numbers-moduli-problem.867120/

 

[BvU]

Well, you got away betting on two horses there ...

 

[SamitC]

Well, you got away betting on two horses there ...

Yep...it was very urgent :)