\[\boxed{\mathbf{1180}\mathbf{.}}\]
\[1)\ arctg\ 0 = 0\]
\[2)\ arctg( - 1) = - arctg\ 1 = - \frac{\pi}{4}\]
\[3)\ arctg\left( - \frac{\sqrt{3}}{3} \right) =\]
\[= - arctg\frac{\sqrt{3}}{3} = - \frac{\pi}{6}\]
\[4)\ arctg\ \sqrt{3} = \frac{\pi}{3}\]