1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Integrate [2x sin (x^2) dx]

  1. Dec 29, 2005 #1
    may i know how to integ [2x sin (x^2) dx]??the answer is -cos(x^2)

    thanx.........
     
  2. jcsd
  3. Dec 29, 2005 #2
    use the subsititution u= x^2
     
  4. Dec 29, 2005 #3
    [tex]\int 2xsin(x^2)dx = \int sin(x^2) dx^2 = -cos(x^2)[/tex]

    The clue is that

    [tex]2xdx = dx^2[/tex]

    marlon

    edit : which is basically the same as what What has stated :)
     
  5. Dec 29, 2005 #4
    oh.....okkk...thanx.......
     
  6. Dec 31, 2005 #5
    Haha, you don't sound to sure on that. Does it make sense?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Integrate [2x sin (x^2) dx]
  1. Integral of sin(2x)dx (Replies: 2)

Loading...