My Math Forum  

Go Back   My Math Forum > College Math Forum > Calculus

Calculus Calculus Math Forum


Reply
 
LinkBack Thread Tools Display Modes
March 22nd, 2008, 10:38 AM   #1
Newbie
 
Joined: Feb 2008

Posts: 16
Thanks: 0

finding length of the curve....

find the length of the curve ;
y=ln(cosx), 0<=x<=pi/3 .
lefucer is offline  
 
March 22nd, 2008, 03:32 PM   #2
Global Moderator
 
Joined: May 2007

Posts: 6,835
Thanks: 733

Re: finding length of the curve....

Quote:
find the length of the curve ;
y=ln(cosx), 0<=x<=pi/3 .
You need to integrate ds=((dy)^2 +(dx)^2)^1/2=((dy/dx)^2 +1)^1/2dx

dy/dx=-sinx/cosx, so ds=secxdx. I'll let you finish.
mathman is offline  
Reply

  My Math Forum > College Math Forum > Calculus

Tags
curve, finding, length



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
Finding the length of curve unwisetome3 Calculus 3 February 17th, 2013 03:58 PM
Length of the Curve pjlloyd100 Calculus 1 February 11th, 2013 11:14 PM
the length of the curve luketapis Calculus 3 March 5th, 2012 06:59 PM
Length curve watty08 Calculus 3 February 24th, 2009 05:07 AM
finding length of the curve.... lefucer Real Analysis 1 September 1st, 2008 08:35 AM





Copyright © 2019 My Math Forum. All rights reserved.