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calculus help |
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phillll227 
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 Topic: calculus helpPosted: 09 March 2005 at 9:56pm |
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for anyone who has taken calc-
S= integral sign i need to evaluate S(sin(x^.5)dx) i know its not likely, but any help is appreciated edit: i'm trying u substitutions and integration by parts double edit: the answer is 2(sin(x^.5)-(x^.5)(cos(x^.5)))+c, i just need to know how to get it Edited by phillll227 |
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Hysteria
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Strike 2 - Language, 9/25 Joined: 02 February 2005 Location: United States Status: Offline Points: 4364 |
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Posted: 09 March 2005 at 9:59pm |
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Failing Algebra II...
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Frozen
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Posted: 09 March 2005 at 10:02pm |
 I'm so glad I didn't take Calculus. |
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Bauerp0weR 18
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Posted: 09 March 2005 at 10:06pm |
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I'm in Adv Algebra and Trig H... did some of that sin cos stuff last year but i have no idea what an integral sign is or what your solving for... sorry dude |
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Black Smart Parts Ion
Halo B Check-It Unimount macroline 68/45 Pure Energy tank |
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SeaWolf
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Posted: 09 March 2005 at 10:23pm |
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i dont see how they got that...
it looks like a quotient rule or something... but that's for differentiation, not integrating... grr... u gotta tell me once u figure it out. |
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phillll227
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Posted: 09 March 2005 at 11:01pm |
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I'm still working on it.. I'll keep you updated
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phillll227
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Posted: 09 March 2005 at 11:13pm |
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Well folks, I'm giving up...
2 words screw calc!! |
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procarbinefreak
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Posted: 09 March 2005 at 11:15pm |
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give me a sec... i'll have an answer for you in a minute... i'm in calc 3 in college
 i stand mistaken... unfortunately... we haven't gotten to those kind of integrals... at first glance i though i could do it... sorry! Edited by procarbinefreak |
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:ShockeR_ratm:
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Posted: 09 March 2005 at 11:15pm |
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hahahhaha, yea right
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Nobody ever suspects the fun police! 
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phillll227
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Posted: 09 March 2005 at 11:45pm |
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I'm still working on it (must be crazy), and I've realized I'm going to have to make some sort of substitution for sin(x^.5) and then use integration by parts, I'm just not sure of the correct way to substitute. All help and any more help is greatly appreciated.
BTW procarbinefreak, this is interesting, I'm only in AP calc AB |
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procarbinefreak
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Posted: 10 March 2005 at 9:41am |
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well... our school breaks it up a lot... calc 1 was through
derivatives... calc 2 was through integrals and substitution.
eventually this quarter we'll get into parts... just not as of
yet.
I have to take calc 1-4 and differential equations, so there's a lot more for me to learn. and i just don't remember doing integration by parts from last year in high school. |
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reifidom
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Posted: 10 March 2005 at 9:56am |
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I've had this stuff, but I don't know if I remember enough to be useful to you here. I'm really horrible at the trig stuff because I took pre-calc instead of trig before stepping into calc I. If I had known I would have definetly taken the trig first.
I'll mess with it and if I can come up with anything that might help I'll post it. But please, don't hold your breath. :) |
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phillll227
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Posted: 10 March 2005 at 3:40pm |
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OK i got it..
the key was to set U equal to x^.5, then x=u^2, dx=2udu |
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MetallicaESPa5
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Posted: 10 March 2005 at 3:45pm |
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Yeah......i'm in geometry.
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SeaWolf
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Posted: 10 March 2005 at 4:50pm |
...would have never thought of that... |
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phillll227 wrote: