Can someone check me on this definite integral

pmqable
Messages
13
Reaction score
0

Homework Statement


integral from 0 to pi of (x sinx)/(1+cos^2x)

Homework Equations


I just need to know if I did it right

The Attempt at a Solution


I got (5pi/6)-1/9
 
Physics news on Phys.org
You are much more likely to get a reply if you explain how you got that result.
 
Fredrik said:
You are much more likely to get a reply if you explain how you got that result.
My thoughts exactly. To check this work, we have to do the integration for ourselves, which is a lot more work than if we can see what you (pmqable) did.
 
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...
Back
Top