\[\boxed{\mathbf{585}\mathbf{.}}\]
\[1)\cos x = 0,35\]
\[x = \pm \arccos{0,35} + 2\pi n\]
\[x \approx \pm 1,2132 + 2\pi n.\]
\[2)\cos x = - 0,27\]
\[x = \pm \left( \pi - \arccos{0,27} \right) + 2\pi n\]
\[x \approx \pm (3,1415 - 1,2974) + 2\pi n\]
\[x \approx \pm 1,8441 + 2\pi n.\]