/cot(-1 + x)\ lim |-----------| pi \ sin(4*x) / x->--+ 4
Limit(cot(-1 + x)/sin(4*x), x, pi/4)
/cot(-1 + x)\ lim |-----------| pi \ sin(4*x) / x->--+ 4
oo
= 178.904702405298
/cot(-1 + x)\ lim |-----------| pi \ sin(4*x) / x->--- 4
-oo
= -167.868016669221
= -167.868016669221