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jaersyn
Group Title
integrate 1/(5+sinx3cosx)
let u = tan(x/2)
cosx = (1u^2)/(1+u^2)
sinx = 2u/(1+u^2)
dx = 2/(1+u^2)
 one year ago
 one year ago
jaersyn Group Title
integrate 1/(5+sinx3cosx) let u = tan(x/2) cosx = (1u^2)/(1+u^2) sinx = 2u/(1+u^2) dx = 2/(1+u^2)
 one year ago
 one year ago

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Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Oh my god... This is a monster to integrate...
 one year ago

jaersyn Group TitleBest ResponseYou've already chosen the best response.0
yeah, after substituting everything i got up to 1/[4(u+(1/8))^2 + (15/64)]
 one year ago

jaersyn Group TitleBest ResponseYou've already chosen the best response.0
if you could help me with that, that'd be cool. I don't know what to do next to integrate
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
You don't have to use intergration by parts. You can use substitution twice.
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Nevermind. I am wrong.
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Dammit. Sorry. I can't solve this :( . It's beyond my level of math.
 one year ago

jaersyn Group TitleBest ResponseYou've already chosen the best response.0
quick unrelated question: if i have 1/u(1u^2) can i use partial fractions to integrate? even though its (u^2 + 1) in the denom? i never came across a negative like that
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
I don't think so... Sorry. I can't help you any further with this :( .
 one year ago

jaersyn Group TitleBest ResponseYou've already chosen the best response.0
that's okay, thanks for looking though
 one year ago

jaersyn Group TitleBest ResponseYou've already chosen the best response.0
i know igbasallote got dis
 one year ago

jaersyn Group TitleBest ResponseYou've already chosen the best response.0
level 99 math wizard
 one year ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
I would love to see how to do this question.
 one year ago

RadEn Group TitleBest ResponseYou've already chosen the best response.0
I GOT IT, BUT VERY LONG TO WRITTING THIS STEPS :(
 one year ago

RadEn Group TitleBest ResponseYou've already chosen the best response.0
as information (if im not mistake), i got the answer : dw:1349498667471:dw
 one year ago

RadEn Group TitleBest ResponseYou've already chosen the best response.0
yes, i think my answer is right ^^,, bacasue the "god of math" told me that : http://www.wolframalpha.com/input/?i=int%28dx%2F%285%2Bsin%28x%293cos%28x%29%29%29
 one year ago
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