Tolong help help lagi

[tex] \lim_{x \to 0 } \frac{1-cos4x}{3xsin2x} [/tex]
=[tex] \lim_{x \to 0 } \frac{1-(1-2sin²2x)}{3xsin2x} [/tex]
=[tex] \lim_{x \to 0 } \frac{2sin²2x)}{3xsin2x} [/tex]
=[tex] \lim_{x \to 0 } \frac{2 sin2x sin2x)}{3x sin2x} [/tex]
=2*2/3*2/2
=4/3