/ pi \ |cos (x) | lim |-------- - x| pi \ 2 / x->--+ 2
Limit(cos(x)^pi/2 - x, x, pi/2)
/ pi \ |cos (x) | lim |-------- - x| pi \ 2 / x->--+ 2
/ pi \ |cos (x) | lim |-------- - x| pi \ 2 / x->--- 2
= -1.57055570562001785750283850410716447105404989290296570219333771270495916190
= -1.57055570562001785750283850410716447105404989290296570219333771270495916190