Incorrect. The values of this function range from $\displaystyle-{2}\usepackage{cmbright}\Huge\$ to 2, and the cosine graph has been reflected over the x-axis. Use these facts to determine the value of a. One cycle is shown over the interval $\displaystyle{\left[{0},\frac{{{2}\pi}}{{3}}\right]}\usepackage{cmbright}\Huge\$ . Use this fact to determine the value of b.