Untuk lim x→0 (1 - cos x ) sin 1/x.

jawab
1- cos x = 2 sin² 1/2 x

limit (x→0) (1 - cos x) sin (1/x) 

limit(x→0)  (2 sin² 1/2 x )(sin (1/x))
x = 0
= 2(sin² 0)sin (1/x)
= 2(0) sin (1/x)
= 0