/ 2 1 \ lim |x - -----------| x->-1+\ 2*cos(pi*x)/
Limit(x^2 - 1/(2*cos(pi*x)), x, -1)
/ 2 1 \ lim |x - -----------| x->-1+\ 2*cos(pi*x)/
3/2
= 1.42679927000473
/ 2 1 \ lim |x - -----------| x->-1-\ 2*cos(pi*x)/
3/2
= 1.59131088617386
= 1.59131088617386