This has the wrong amplitude and period, and this is the graph of a cosine function, not a sine function. In particular, the graph of $\displaystyle{y}={2}{\sin{{3}}}{x}\usepackage{cmbright}\Huge\$ must pass through the point $\displaystyle{\left({0},{0}\right)}\usepackage{cmbright}\Huge\$ , while this graph does not.