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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)
 2 years ago
 2 years 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)
 2 years ago
 2 years 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...
 2 years 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)]
 2 years 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
 2 years 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.
 2 years ago

Dido525 Group TitleBest ResponseYou've already chosen the best response.0
Nevermind. I am wrong.
 2 years 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.
 2 years 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
 2 years 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 :( .
 2 years ago

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

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

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

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

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