If you shift the graph of $\displaystyle{y}={\cos{\theta}}\usepackage{cmbright}\Huge\$ by $\displaystyle\frac{\pi}{{2}}\usepackage{cmbright}\Huge\$ units to the right, the hill that had the y-axis running through the center will now be positioned over the interval $\displaystyle{\left[{0},\pi\right]}\usepackage{cmbright}\Huge\$ . This is also true of the graph of $\displaystyle{y}={\sin{\theta}}\usepackage{cmbright}\Huge\$ . The rest of the graph will consist of the repeating valley and hill pattern. This is the graph of $\displaystyle{y}={\sin{\theta}}\usepackage{cmbright}\Huge\$ .