Incorrect. The graph of $\displaystyle{y}={\cos{\theta}}\usepackage{cmbright}\Huge\$ has a hill with the y-axis running through the middle, and contains the point

$\displaystyle{\left({0},{1}\right)}\usepackage{cmbright}\Huge\$ . The hill covers the interval from $\displaystyle\theta=-\frac{\pi}{{2}}\usepackage{cmbright}\Huge\$ to $\displaystyle\theta=\frac{\pi}{{2}}\usepackage{cmbright}\Huge\$ . It has a repeating hill and valley pattern in both directions. You can use this information to figure out where cosine equals 0, 1, and $\displaystyle-{1}\usepackage{cmbright}\Huge\$ . Remember that $\displaystyle{{\cos{{60}}}}^{\circ}=\frac{{1}}{{2}}\usepackage{cmbright}\Huge\$ and use this to find the points where cosine equals $\displaystyle\frac{{1}}{{2}}\usepackage{cmbright}\Huge\$ .