Complex number question help please! (1 Viewer)

[naypho]

Hi everyone, I'm drawing a blank on what to do to tackle this. Not sure whether using mod-arg form is the best way to go here? I'm really struggling

 

[Drdusk]

Hi everyone, I'm drawing a blank on what to do to tackle this. Not sure whether using mod-arg form is the best way to go here? I'm really struggling

View attachment 29544

You need to use rules of complex numbers to simplify the expression on the RHS. There's no need for mod arg form.

Useful tools that you will need are:





Using those rules you will be able to simplify the expression and just sub in the part which is given to you in the appropriate places.

 

[naypho]

You need to use rules of complex numbers to simplify the expression on the RHS.

Useless tools that you will need are:





Using those rules you will be able to simplify the expression and just sub in the part which is given to you in the appropriate places.

Thanks so much! I'll give that a try.

 

[vernburn]

Here is my solution: