\[\boxed{\mathbf{590}\mathbf{.}}\]
\[1)\sin x = \frac{2}{7}\]
\[x = ( - 1)^{n} \bullet \arcsin\frac{2}{7} + \pi n.\]
\[2)\sin x = - \frac{1}{4}\]
\[x = ( - 1)^{n + 1} \bullet \arcsin\frac{1}{4} + \pi n.\]
\[3)\sin x = \frac{\sqrt{5}}{3}\]
\[x = ( - 1)^{n} \bullet \arcsin\frac{\sqrt{5}}{3} + \pi n.\]