/5*pi*x\ lim tan|------| x->1+ \ 2 /
Limit(tan(((5*pi)*x)/2), x, 1)
-oo
= -19.2085762899053
/5*pi*x\ lim tan|------| x->1- \ 2 /
oo
= 19.2085762899053
-19.2085762899053