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!

What am I doing wrong?

  1. May 19, 2007 #1
    On two problems, I got the wrong answer w/ the same approach; yet I can't find my mistake...

    Attached Files:

  2. jcsd
  3. May 19, 2007 #2
    First problem: Although you have implicitly performed a substitution, you haven't done it completely. The integral of tan(x) is -ln(cos(x)), but that of tan(x/3) is slightly different. Use u = x/3.

    Second: [Perhaps you meant to write 2ln(sin(theta/3))?] You have done the same mistake here as well.
  4. May 19, 2007 #3
    Yes, I did intend to write 2ln(sin(theta/3)). Thanks for your help
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?