Argument of Complex Numbers

IsThisIt??? · 2012-04-26 11:52:08

Having trouble rapping my head around the angle of a complex number in different quadrants, especially the 4th quadrant. Take for example z=1-i When I calculate arctan(-1/1) I get -45deg. What I am unsure of is what I do with this answer. Do I add it to 270deg, which will give 225, which would lie in the 3rd quad? Do I add…

26-04-2012 11:52AM

#1

IsThisIt???

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Having trouble rapping my head around the angle of a complex number in different quadrants, especially the 4th quadrant.

Take for example z=1-i
When I calculate arctan(-1/1) I get -45deg.
What I am unsure of is what I do with this answer.
Do I add it to 270deg, which will give 225, which would lie in the 3rd quad?
Do I add it to 360deg?

If anyone can explain this to me or link me to a place that can it would be much appreciated.

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#2 26-04-2012 02:36PM

TheBody

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Maybe you should check out some videos on youtube. Maybe try this one for example:

http://www.youtube.com/watch?v=g5_ojBMubAg

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#3 26-04-2012 03:06PM

IsThisIt???

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Exactly what I was looking for, couldn't find a good video of it myself.

Thank you.

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#4 26-04-2012 06:56PM

TheBody

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No problem. Glad I could help.

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