當x趨向於0+時,limln(sin3x)/ln(sinx)的極限

當x趨向於0+時,limln(sin3x)/ln(sinx)的極限


lim(x→0+)ln(sin3x)/ln(sinx)
=lim(x→0+)[3cos3x/(sin3x)/[cosx/sinx]
=lim(x→0+)(3sinx/sin3x=1