Math Is Fun Forum
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#1 2014-03-15 06:27:11
- gourish
- Member
- Registered: 2013-05-28
- Posts: 153
proof of arg(z)=arg(z1)+arg(z2)+.....+arg(zn) if z=z1z2z3......zn
i just accepted it as the truth but now i am curious... how did we get that rule i just need a simple proof...
"The man was just too bored so he invented maths for fun"
-some wise guy
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#2 2014-03-15 06:35:31
- Bob
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- Registered: 2010-06-20
- Posts: 10,621
Re: proof of arg(z)=arg(z1)+arg(z2)+.....+arg(zn) if z=z1z2z3......zn
You can get there using the compound angle formulas. Have a look at
http://en.wikipedia.org/wiki/Complex_nu … d_division
Bob
Children are not defined by school ...........The Fonz
You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you! …………….Bob 
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