# L' Hopital's Rule

• Feb 26th 2010, 10:11 AM
vinson24
L' Hopital's Rule
Find the limit $\lim_{x\to0^{+}}{ln(sinx)}/{ln(tanx)}$
I'm getting one as my answer but not sure if its right
• Feb 26th 2010, 10:49 AM
chisigma
Once You realize that...

$\ln \tan x = \ln \sin x - \ln \cos x$

... finding the limit becomes very easy...

Kind regards

$\chi$ $\sigma$
• Feb 26th 2010, 10:51 AM
vinson24
$\lim_{x \rightarrow 0+} \frac{\ln \sin x}{\ln \tan x}= \lim_{x \rightarrow 0+} \frac{\ln \sin x}{\ln \sin x - \ln \cos x }= \lim_{x \rightarrow 0+} \frac{1}{1+ \frac{\ln \cos x}{\ln \sin x}}$
$\chi$ $\sigma$