• Support PF! Buy your school textbooks, materials and every day products Here!

Antiderivative of anti-trigs(arctan)

  • Thread starter vipertongn
  • Start date
  • #1
98
0

Homework Statement



arctan(x)/(1+x2). finding the antiderivative

Homework Equations



arctanx=1/1+x^2

The Attempt at a Solution



I tried pulling out arctan(x) S 1/(1+x^2) dx --> arctan^2(x)+c but the answer also has a 1/2 in front of the arctan...where'd that come from?
 

Answers and Replies

  • #2
Gib Z
Homework Helper
3,346
5
You can't just pull out the arctan! You can only pull out constants. Try making a u-substitution.
 

Related Threads on Antiderivative of anti-trigs(arctan)

  • Last Post
Replies
2
Views
439
Replies
7
Views
12K
Replies
4
Views
3K
  • Last Post
Replies
4
Views
2K
Replies
9
Views
24K
  • Last Post
Replies
2
Views
2K
Replies
4
Views
3K
  • Last Post
Replies
4
Views
1K
  • Last Post
Replies
8
Views
2K
  • Last Post
Replies
15
Views
759
Top