Correct. To compute these using a scientific calculator, do the following (do the reverse order for a graphing calculator):

For equation 1), enter 5, press the 2nd key and TAN. The result will be $\displaystyle{78.69006753}\approx{78.7}\usepackage{cmbright}\Huge\$ .

For equation 2), enter 0.65, press the 2nd key and COS. The result will be $\displaystyle{49.45839813}\approx{49.5}\usepackage{cmbright}\Huge\$ .