/cos(x)\ lim |------| x->1+\-1 + x/
Limit(cos(x)/(-1 + x), x, 1)
oo
= 80.7423942781574
/cos(x)\ lim |------| x->1-\-1 + x/
-oo
= -82.4253239461323
80.7423942781574