/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