Question
$\mathop {\lim }\limits_{x \to 0} x\log (\sin x) = $
$ = \log \,\left[ {\mathop {\lim }\limits_{x \to 0} \,{{(1 + \sin x - 1)}^{\frac{{x(\sin x - 1)}}{{\sin x - 1}}}}} \right]$
$ = {\log _e}[{e^{\mathop {\lim }\limits_{x \to 0} \,x(\sin x - 1)}}] = {\log _e}1.$
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