Question

Question #a9d75

Answer 1

See the explanation below.

Explanation:

The limits are the following :

`lim_(x->+oo)arctanx=pi/2`

`lim_(x->-oo)arctanx=-pi/2`

graph{(y-arctanx)(y-pi/2)(y+pi/2)=0 [-8.89, 8.89, -4.444, 4.445]}