# Help with maclauren series.

1. Feb 18, 2007

### rcmango

1. The problem statement, all variables and given/known data

find maclauren series for: logx and arctan

2. Relevant equations

heres the maclauren series:
http://img164.imageshack.us/img164/2792/untitledff7.jpg [Broken]

3. The attempt at a solution

to solve these, do i need to keep applying the maclauren series formula like i would for sin or cos?

in other words, taking the derivative for logx and arctan, if so, can someone start me out with the derivatives, i don't know them.

also is e^x the same as xlog(e) ?

Last edited by a moderator: May 2, 2017
2. Feb 18, 2007

### cristo

Staff Emeritus
Yes
Well, what do you know. Do you not know the derivative of log(x)?

To calculate the derivative of arctan(x), try letting y=arctan(x) noting that now x=tan(y), and then differentiating both sides wrt x.
Erm, no, what makes you think this?

Last edited by a moderator: May 2, 2017