You probably set up the incorrect equation, $\displaystyle{{\tan{{65}}}}^{\circ}=\frac{{x}}{{14}}\usepackage{cmbright}\Huge\$ , and solved it. A correct way to set up the equation is $\displaystyle{{\tan{{65}}}}^{\circ}=\frac{{14}}{{x}}\usepackage{cmbright}\Huge\$ .