Integration Help v2

[MrCodeDude]

Integral of This

I have no idea.

 

[minendo]

7

 

[RaynorWolfcastle]

trig sub. now.

 

[virtueixi]

Why is it that whenever I post h.w help I get flamed but when someone else does twice........:disgust::disgust::clock::camera::brokenheart::brokenheart::camera::clock::disgust::evil::frown::gift::heart::light::heart::gift::frown::evil::disgust::clock::camera::brokenheart::beer::beer::brokenheart::camera::clock::disgust::evil::frown::gift::frown::evil::disgust::clock::camera::brokenheart::beer::beer::brokenheart::camera::clock::disgust::evil::frown::gift::heart::light::lips::|:moon::music::moon::|:lips::light::heart::gift::frown::evil::disgust::clock::camera::brokenheart::beer::beer::brokenheart::camera::clock::disgust::evil::frown::gift::heart::light::lips::|:moon::music:

:music::moon::|:lips::light::heart::gift::frown::evil::disgust::clock::camera::brokenheart::beer::beer::brokenheart::camera::clock::disgust::evil::frown::gift::heart::light::lips::|:moon::music::moon::|:lips::light::heart::gift::frown::evil::disgust::clock::camera::brokenheart::beer::beer::brokenheart::camera::clock::disgust::evil::frown::gift::heart::light::lips:

 

[Goosemaster]

u=x
a=2

du=1/a arctan u/a


that should enough to get you through it:evil:

 

[MrCodeDude]

Originally posted by: Goosemaster
u=x
a=2

du=1/a arctan u/a


that should enough to get you through it:evil:

I have no idea how you go that. How does dU = 1/a arctan u/a if U = x ?

 

[MrCodeDude]

Originally posted by: virtueixi
Why is it that whenever I post h.w help I get flamed but when someone else does twice........:disgust::disgust::clock::camera::brokenheart::brokenheart::camera::clock::disgust::evil::frown::gift::heart::light::heart::gift::frown::evil::disgust::clock::camera::brokenheart::beer::beer::brokenheart::camera::clock::disgust::evil::frown::gift::frown::evil::disgust::clock::camera::brokenheart::beer::beer::brokenheart::camera::clock::disgust::evil::frown::gift::heart::light::lips::|:moon::music::moon::|:lips::light::heart::gift::frown::evil::disgust::clock::camera::brokenheart::beer::beer::brokenheart::camera::clock::disgust::evil::frown::gift::heart::light::lips::|:moon::music:

:music::moon::|:lips::light::heart::gift::frown::evil::disgust::clock::camera::brokenheart::beer::beer::brokenheart::camera::clock::disgust::evil::frown::gift::heart::light::lips::|:moon::music::moon::|:lips::light::heart::gift::frown::evil::disgust::clock::camera::brokenheart::beer::beer::brokenheart::camera::clock::disgust::evil::frown::gift::heart::light::lips:

Only a-holes flame.

 

[MrCodeDude]

bump

 

[A5]

Hrm...could probably do it with integration by parts...

 

[Goosemaster]

Originally posted by: MrCodeDude

Originally posted by: Goosemaster
u=x
a=2

du=1/a arctan u/a


that should enough to get you through it:evil:

I have no idea how you go that. How does dU = 1/a arctan u/a if U = x ?

nevermind...I screwed it up...

u= arctan(x/2) du= dx/(4 +x^2) dx=(4 + x^2) du

INT(

( u / (4+ x^2) ) ( 4 + x^2 ) du the (4 + x^2) cancel out


INT of arctan^2 (x/2) is

xarctan(x/2) - ln(1+ u^2) ^ 1/2 + c

 

[A5]

Or not...looks like a pain in the ass...

 

[Goosemaster]

 

[Zorba]

I say it is (ATAN(x/2))^2/4+C