anonymous
  • anonymous
I need help with the bottom two integrals, top one is an example of how to do'em http://i.imgur.com/vRAvJ.jpg?1
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
The questions are from the partial fractions section to clue you in on how to maybe go about this
anonymous
  • anonymous
The thing is I went further into this, but it got real hectic. The answer I got for the bottom left integral was similar to the answer, but not quite, not sure where I went wrong
experimentX
  • experimentX
I'll give you short answer of tan |dw:1349542124538:dw|

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experimentX
  • experimentX
|dw:1349542218574:dw|
experimentX
  • experimentX
for the other one ... use weistrass subs ... doesn't look nice to me.
anonymous
  • anonymous
|dw:1349542371259:dw|
experimentX
  • experimentX
|dw:1349542384994:dw|
anonymous
  • anonymous
Oh.. wow, see i don't have math vision like that wth. how do you even know. just you've done it so many times??
experimentX
  • experimentX
I've seen it couple of times.
anonymous
  • anonymous
that's the right answer for that one, but i have to use the substitutions given, when should I sub them in?
anonymous
  • anonymous
and what is "weistrass subs"
experimentX
  • experimentX
http://en.wikipedia.org/wiki/Weierstrass_substitution no matter what ... these substitutions always work ... if you can find nice answers from other method, don't use this.
experimentX
  • experimentX
looks like you have simplified it so nicely ... |dw:1349542787800:dw|
anonymous
  • anonymous
what hapens to the 4?
anonymous
  • anonymous
i tried taking the 4 out so its 15/256 or something then doing the arctan thing
zepdrix
  • zepdrix
Buhaha, you took a picture of your notebook XD Nice handwriting at least c:
experimentX
  • experimentX
yeah that would even make it nicer. |dw:1349542995485:dw|
anonymous
  • anonymous
roflmao "nice", yes.
anonymous
  • anonymous
thnx zep, it's easier for you guys to see and understand the problem that way roflmao
zepdrix
  • zepdrix
It's bubbly like comic sans, and it's legible XD hehe
anonymous
  • anonymous
is that right ex?
experimentX
  • experimentX
should be similar to it. not sure ... try working on paper ... doing here is like playing around. i never get it right.
anonymous
  • anonymous
1/(15/256) arctan [(u+1/8)/(sqrt (15/256))]
anonymous
  • anonymous
|dw:1349543315889:dw|
anonymous
  • anonymous
a^2 = 15/256 so a is sqrt(15/256) right
anonymous
  • anonymous
i g2g now, but thanks for all your help. if anyone leaves more detailed info that'd be great, i'll be back to check.
anonymous
  • anonymous
and screw weierstrass
experimentX
  • experimentX
I don't like Weierstrass either

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