Question

Evaluate the following integral
(sqrt3)/3
I=∫ dx/(1+x^2)
-sqrt3

Answer 1

\[\frac{d}{dx}\tan x=\frac{1}{1+x^2}\]

Answer 2

....integrated via table method ;)

Answer 3

sounds right to me

Answer 4

sin/cos ups to: -ln(cos), or ln(sec)

Answer 5

thanks really appreciate the help