Correct. On a scientific calculator, enter 0.8, then press the 2nd key and SIN. Do this in the reverse order for a graphing calculator. Then look at the tenths place to help you round to the nearest degree.

$\displaystyle{{\sin}}^{{-{1}}}{\left({0.8}\right)}={53.13010235}\ldots\approx{{53}}^{\circ}\usepackage{cmbright}\Huge\$