/1 - cos(x)\ lim |----------| x->pi+\ x - pi /
Limit((1 - cos(x))/(x - pi), x, pi)
oo
= 301.996688753829
/1 - cos(x)\ lim |----------| x->pi-\ x - pi /
-oo
= -301.996688753818
301.996688753829