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!

How to integrate 13e^(-0.2x)sin(x)

  1. Feb 23, 2006 #1
    what is the integral of 13e^(-0.2x) sinx?

    i'm using the solving for the unknown integral method.
    i did this twice (each time i took the integral twice, moved the unknown integral to the same side, and divided by 13.52?? I still cannot figure out what i am doing wrong.


    solve for the diffential. dy/dx = x-4+xy-4y y(0)=4
    how can i move it so that x is on one side and y on the other? what is the integral of xy?
     
  2. jcsd
  3. Feb 23, 2006 #2
    The RHS is factorable into a function of x and a function of y.
     
  4. Feb 23, 2006 #3
    nvm the first problem. I solved it.
    the integral =

    12.5e^(-.2x) sinx + 2.5e^(-.2x) cosx
     
  5. Feb 23, 2006 #4
    oops, its should be a - in between.
     
  6. Feb 23, 2006 #5
    oops still wrong. this is right: -12.5e^(-.2x) cosx - 2.5e^(-.2x) sinx
     
  7. Feb 23, 2006 #6
    (x-4)(y+1)! Now i see it, thank you!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: How to integrate 13e^(-0.2x)sin(x)
  1. Integrating Sin(x^3) (Replies: 2)

Loading...