\[1)\ y = \sin|x|\]
\[2)\ y = \left| \sin x \right|\]
\[3)\ y = \sin x - x\]
\[\sin x = 0:\]
\[y = 0 - \pi n = - \pi\text{n.}\]
\[Стационарные\ точки:\]
\[y^{'}(x) = \cos x - 1 = 0\]
\[\cos x = 1\]
\[x = 2\pi\text{n.}\]
\[График\ функции:\]
\[4)\ y = \log_{\frac{1}{2}}{\sin x}\]
\[\sin x = 1:\]
\[y = \log_{\frac{1}{2}}1 = 0.\]
\[0 < \sin x < 1:\]
\[y > \log_{\frac{1}{2}}1\]
\[y > 0.\]
\[Область\ определения:\]
\[\sin x > 0.\]