What am I doing wrong?

  • #1
158
0

Main Question or Discussion Point

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

Attachments

Answers and Replies

  • #2
2,063
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.
 
  • #3
158
0
Yes, I did intend to write 2ln(sin(theta/3)). Thanks for your help
 

Related Threads on What am I doing wrong?

  • Last Post
Replies
8
Views
1K
  • Last Post
Replies
2
Views
910
Replies
4
Views
5K
Replies
4
Views
2K
  • Last Post
Replies
17
Views
16K
Replies
3
Views
1K
Replies
1
Views
1K
  • Last Post
Replies
4
Views
791
Replies
2
Views
2K
Top