What is the Taylor Polynomial for Arcsin x at a = 0 and n = 3?

vigintitres
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Homework Statement



Find the Taylor polynomial T_n(x) for the function arcsin x at a = 0, n = 3

Homework Equations



Well, I understand the Taylor poly. for sine, but how do i get arcsine?
 
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Put f(x)=arcsin(x)
find f(0),f'(0) and so on and just put it into the formula.
 
Okay, is the problem that you don't know how to take the derivative or arcsin? Because if you can do that then the rest of the problem should be just like finding the taylor polynomial of sine.

I tried the problem out and the only thing that's different then the sine curve problem is that taking the derivative of arcsin is considerably harder.
 
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thanks all, got it...
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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