/ /pi*x\\ |cos|----|| | \ 2 /| lim |---------| x->0+| 2 | \ 1 - x /
Limit(cos((pi*x)/2)/(1 - x^2), x, 0)
/ /pi*x\\ |cos|----|| | \ 2 /| lim |---------| x->0+| 2 | \ 1 - x /
1
= 1
/ /pi*x\\ |cos|----|| | \ 2 /| lim |---------| x->0-| 2 | \ 1 - x /
1
= 1
= 1