  In this paper, we study the Strichartz-type estimates of the solution for the
linear wave equation with inverse square potential. Assuming the initial data
possesses additional angular regularity, especially the radial initial data,
the range of admissible pairs is improved. As an application, we show the
global well-posedness of the semi-linear wave equation with inverse-square
potential $\partial_t^2 u-\Delta u+\frac{a}{|x|^2}u=\pm|u|^{p-1}u$ for power
$p$ being in some regime when the initial data are radial. This result extends
the well-posedness result in Planchon, Stalker, and Tahvildar-Zadeh.
