Antiderivative of anti-trigs(arctan)

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

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

2. Relevant equations


3. 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?

Gib Z

Homework Helper
You can't just pull out the arctan! You can only pull out constants. Try making a u-substitution.

The Physics Forums Way

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving