# What does this notation stand for?

Discussion in 'Homework Help' started by magodiafano, Feb 12, 2011.

1. ### magodiafano Thread Starter New Member

Feb 12, 2011
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0
The professor gave me this exercise, but since I am new in this subject I did not understand what he wants.

"In a single phase circuit Va=120 amplitude and 45degree as phase (written in polar form) and Vb = 100 amplitude and -15 phase.
Find Vba in polar form."

Does it mean that I have to do Vb-Va? or am I wrong?

2. ### thatoneguy AAC Fanatic!

Feb 19, 2009
6,357
727
Did the prof use $\theta$ for "polar form you've written out above", or is he trying to get you to understand the difference between rectangular format (a±bi) and polar format $a \theta \phi$

3. ### shteii01 AAC Fanatic!

Feb 19, 2010
4,419
696
I think you are right. I would interpret that as Vb-Va.