The point $\displaystyle{\left(\frac{{{7}\pi}}{{4}},\frac{\sqrt{{2}}}{{2}}\right)}\usepackage{cmbright}\Huge\$ is on the graph of $\displaystyle{y}={\cos{\theta}}\usepackage{cmbright}\Huge\$ . Which point is not on the graph of $\displaystyle{y}={\cos{\theta}}\usepackage{cmbright}\Huge\$ ?