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**Leroy****Guest**

Can one do logarithm of imaginery number?please explain.

**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 7,525

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**Leroy****Guest**

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

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,922

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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**Leroy****Guest**

So,let me try, is this correct

ln(3+4i)=ln5+atan(4/3)i

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,922

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.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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**Leroy****Guest**

Thank you a lot.

**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 102,922

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.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

**Online**