/ 3 \ |sin (z)| lim |-------| pi | pi| z->--+| z - --| 4 \ 2 /
Limit(sin(z)^3/(z - pi/2), z, pi/4)
/ 3 \ |sin (z)| lim |-------| pi | pi| z->--+| z - --| 4 \ 2 /
___ -\/ 2 ------- pi
= -0.450158158078553
/ 3 \ |sin (z)| lim |-------| pi | pi| z->---| z - --| 4 \ 2 /
___ -\/ 2 ------- pi
= -0.450158158078553
= -0.450158158078553