Lim Cos x - cos 5x / 1-cos2x X--> 0 Hitung nilai limit berikut

limit (0/0)

lim (x->0)  - (cos 5x - cos x) / (2sin² x)
= lim (x->0)  - (- 2 sin 3x . sin 2x) / ( 2 sin² x)
= 2 (3)(2) / (2)
= 6