/1 + x \ lim asin|------| x->-1+ \-1 + x/
Limit(asin((1 + x)/(-1 + x)), x, -1)
0
= -1.3329562997149e-34
/1 + x \ lim asin|------| x->-1- \-1 + x/
= 2.41280410802546e-30
-1.3329562997149e-34