/ pi\ | 2*atan(x) - --| | 2 | lim |-1 + --------------| x->1+| 2 | \ x /
Limit(-1 + (2*atan(x) - pi/2)/x^2, x, 1)
/ pi\ | 2*atan(x) - --| | 2 | lim |-1 + --------------| x->1+| 2 | \ x /
-1
= -1
/ pi\ | 2*atan(x) - --| | 2 | lim |-1 + --------------| x->1-| 2 | \ x /
-1
= -1
= -1