Lim x>0 sin4x - sin 2x / 6x

sin 4x - sin 2x / 6x
= sin 4x / 6x - sin 2x / 6x
= 4/6 - 2/6
= 2/6
= 1/3

cara lain
lim(x->0)  (sin 4x - sin 2x) / (6x)
lim(x->0) ( 2 cos 2x sin x)/(6x)

lim (x->0) 2 cos 2x . lim (x->0) sin x/6x
= (2 cos 0)/(6)
= 2(1) / 6
= 1/3