Tried both u substitution letting u = 1+x^2, and u = atan(x), neither worked. Tried using integration by parts as well. Any suggestions in the right direction?
Tried both u substitution letting u = 1+x^2, and u = atan(x), neither worked. Tried using integration by parts as well. Any suggestions in the right direction?
The second integral is a standard integral according to Wolfram (are you "allowed" to know this result or do you have to show/derive it?)