Problem:

Find |A|

A= 2\(e^{-j120}\) + 2\(e^{j60}\)


Attempted solution:

I basically just converted it to algebraic form and ended up with:

A= -1-1.73j + 1+ 1.73j

Which ended up canceling everything up.
so,

A= 0 and then the magintude is 0.

-----------------
Honestly, it sounded too easy to be true, so have I done any mistakes? If not any help would be appreciated.

 

Problem:

Find |A|

A= 2e^(-120j) + 2e^(60j)


Attempted solution:

I basically just converted it to algebraic form and ended up with:

A= -1-173j + 1+ 1.73j

Which ended up canceling everything up.
so,

A= 0 and then the magintude is 0.

-----------------
Honestly, it sounded too easy to be true, so have I done any mistakes? If not any help would be appreciated. thanks

-173j + 1.73j = -171.27j

 

Oops sorry about that. It's -1.73j + 1.73j

 

Take a piece of paper. Draw the phasors. It's immediately obvious that they cancel each other. No maths needed.

 

Thanks just wanted to make sure, it caught my attention that it was that simple in a bunch of very difficult problems. Again guys, thanks for the help.