limit x mendekati 0 jebal..

Kelas 11 Matematika
Bab Limit

Lim (sin x + sin 3x)/(x . cos x)
x→0

= lim (2 . sin ((x + 3x)/2) . cos ((x - 3x)/2)/(x . cos x)
...x→0

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

= 2 . ((sin 2x)/x). (cos x)/(cos x)
= 2 . 2
= 4