Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Double integral question

  1. Nov 15, 2007 #1
    Double integral question....

    1. The problem statement, all variables and given/known data

    Evaluate the integrals shown ( I have attached the file with the integral).

    2. Relevant equations

    3. The attempt at a solution

    Ok, for the first one, can you tell me how I integrate sin x^2...?? which method should i use? And for the second one, I dont really understand what the R is. What do u have to do to find the values next to to the integrand. Thanks!

    Attached Files:

  2. jcsd
  3. Nov 15, 2007 #2
    Can you integrate x*sin(x^2)?
  4. Nov 15, 2007 #3
    yea but this doesnt have an x in front of it
  5. Nov 15, 2007 #4
    any helpers lol??
  6. Nov 15, 2007 #5
    Then I have no idea.
  7. Nov 15, 2007 #6


    User Avatar
    Science Advisor
    Homework Helper

    x is in the limits of the dy integration. Integrating sin(x^2) dy gives y*sin(x^2). Now put in the y limits THEN integrate dx. See, it does have an x in front of it.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook