/ 4 - x \ lim |---------| x->4+| /pi*x\| |cot|----|| \ \ 2 //
Limit((4 - x)/cot((pi*x)/2), x, 4)
/ 4 - x \ lim |---------| x->4+| /pi*x\| |cot|----|| \ \ 2 //
0
= 4.68278514949002e-29
/ 4 - x \ lim |---------| x->4-| /pi*x\| |cot|----|| \ \ 2 //
0
= 4.68278514949002e-29
= 4.68278514949002e-29