February 18th, 2009, 03:58 AM  #1 
Newbie Joined: Feb 2009 Posts: 2 Thanks: 0  Calc length by integration
So I have this problem: determine the length of the curve defined by between the points and . I've gotten this far: . I still have to substitute , but after that how do I turn this into an integral? I've been at this for an hour (.'). Help... 
February 18th, 2009, 05:00 AM  #2  
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,963 Thanks: 1148 Math Focus: Elementary mathematics and beyond  Re: Calc length by integration Quote:
 
February 18th, 2009, 01:32 PM  #3  
Global Moderator Joined: May 2007 Posts: 6,821 Thanks: 723  Re: Calc length by integration Quote:
 
February 18th, 2009, 02:13 PM  #4 
Newbie Joined: Feb 2009 Posts: 2 Thanks: 0  Re: Calc length by integration
Should've done a quick search first, sorry. So we're at: And I'm stumped again... There's no formula for the integral of g after f (as far as I know.) (I didn't really understand your explanation. Way too advanced for me...) (BTW, I have a test tomorrow. *shivers*) 
February 18th, 2009, 03:09 PM  #5  
Global Moderator Joined: Oct 2008 From: London, Ontario, Canada  The Forest City Posts: 7,963 Thanks: 1148 Math Focus: Elementary mathematics and beyond  Re: Calc length by integration Quote:
I've tried working this one out using trig substitution and the like, but had no success. That's not to say there isn't an answer, though. Just seems to me to be quite complicated.  

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