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## #1 2012-10-21 16:36:17

Leroy
Guest

### Logarithm

Can one do logarithm of imaginery number?please explain.

## #2 2012-10-21 19:47:44

bob bundy
Registered: 2010-06-20
Posts: 8,322

### Re: Logarithm

hi Leroy,

Yes you can.  See

http://en.wikipedia.org/wiki/Complex_logarithm

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

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## #3 2012-10-21 23:30:27

Leroy
Guest

### Re: Logarithm

There is no example in that link,it will be great if you show an example

## #4 2012-10-21 23:54:23

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Logarithm

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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## #5 2012-10-22 00:01:50

Leroy
Guest

### Re: Logarithm

So,let me try, is this correct
ln(3+4i)=ln5+atan(4/3)i

## #6 2012-10-22 00:12:21

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Logarithm

Hi;

That is correct. Very good!

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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Leroy
Guest

Thank you a lot.

## #8 2012-10-22 03:37:23

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Logarithm

Hi;

You are welcome!

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

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