Shoutbox

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Originally posted by Chrono

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Originally posted by John Anderton
x^2 = (sin)^2

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lol thats the same than x=sen

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I think he was thinking of doing something with De'Mouive's but I don't think it will work in this case.  What I did to get as far as I did was I had to first expand the equations and then use a reversal of the product rule and you should then try to simplify what you get.  It is the only way I can think of doing this problem.

EDIT:  Just expanding out the equation I got it to    x^3+1/x+x/(x^4+1)    you should be able to integrate it in parts now.

for some reason maple is giving me 1/4*x^4+ln(x)+1/2*arctan(x^2)  but I didn't think the arctan was right, I thought it was meant to be a ln   and for some reason it is different to my other expression   I guess it might be that I messed up somewhere last time, I could get rid of the squareroot which i couldn't before.

I don't know, lets hope I'm not as dodgy in my maths tutorial this afternoon, I'll ask my teacher to help if I remember