Kevin C. answered • 04/09/13

Tutor

5.0
(607)
Successful Math Tutor -- Recently retired high school math teacher

int (1/(1+u^2) du = arc tan u + c

Therefore int (4/(1+x^2) dx = 4(arc tan x) evaluated from x = -1 to 0.

I hope this helps.

Kevin

John C.

09/23/13