/cos(x)\ lim |------| x->oo\sin(x)/
Limit(cos(x)/sin(x), x, oo, dir='-')
/cos(x)\ lim |------| x->0+\sin(x)/
oo
= 150.997792488027
/cos(x)\ lim |------| x->0-\sin(x)/
-oo
= -150.997792488027
150.997792488027