1. Limited time only! Sign up for a free 30min personal 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!

Homework Help: Another integral

  1. Sep 27, 2011 #1
    Find the integral of

    X^3sin(x^2)

    No useful substitutions I can find, integration by parts gets chaotic.
     
  2. jcsd
  3. Sep 27, 2011 #2

    LCKurtz

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Write it as x(x2)sin(x2) and begin with substitution u = x2.
     
  4. Sep 27, 2011 #3
    Got the answer. Thank you.

    I wish I were able to recognize these things more quickly.
     
  5. Sep 27, 2011 #4

    SammyS

    User Avatar
    Staff Emeritus
    Science Advisor
    Homework Helper
    Gold Member

    Practice, practice, practice ...
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook