\[\boxed{\mathbf{740}\mathbf{.}}\]
\[1)\ tg\ x > 4;\]
\[arctg\ 4 + \pi n < x < \frac{\pi}{2} + \pi n.\]
\[2)\ tg\ x \leq 5;\]
\[- \frac{\pi}{2} + \pi n < x \leq arctg\ 5 + \pi n.\]
\[3)\ tg\ x < - 4;\]
\[- \frac{\pi}{2} + \pi n < x < arctg( - 4) + \pi n\]
\[- \frac{\pi}{2} + \pi n < x < - arctg\ 4 + \pi n.\]
\[4)\ tg\ x \geq - 5;\]
\[\text{arctg}( - 5) + \pi n \leq x < \frac{\pi}{2} + \pi n\]
\[- arctg\ 5 + \pi n \leq x < \frac{\pi}{2} + \pi n.\]