The terminal side of $\displaystyle{{0}}^{\circ}\usepackage{cmbright}\Huge\$ in standard position intersects the unit circle at $\displaystyle{\left({1},{0}\right)}\usepackage{cmbright}\Huge\$ .

Therefore, the value of $\displaystyle{{\cos{{0}}}}^{\circ}=\usepackage{cmbright}\Huge\$ _____.