lim x mendekati 0 cos 8x - 1 / x sin 4x

Kelas 11 Matematika
Bab Limit

lim (cos 8x - 1)/(x . sin 4x)
x→0

= lim (1 - 2 sin² 4x - 1)/(x . sin 4x)
...x→0

= lim (- 2 sin 4x . sin 4x)/(x . sin 4x)
...x→0

= (- 2 . sin 4x)/x
= - 2 . 4
= - 8