aplici formula
lim sinu/u=1 cand u-->0
u=2xsin4x
Amplifici fractia cu sin 4x
x-->0 limsin4x*sin(2xsin4x)/sin4x*2x²=limsin4x/x*limsin(2xsin4x)/2x*sin4x
notam l1 prima limita si l2 a 2-a limita
l2=lim sin(2xsin4x)/2x*sin4x=1 conf formulei scrise la inceput
l1=limsin4x/x AMplificam fractia cu 4
l1=lim4 sin4x/4x=4limsin4x/4x=4*1=4 conf aceleiasi formule
deci L=l1*l2=1*4=4
