Since they are complementary, the sum of their angle measure is equal to 90°. We have the equation
[tex]\begin{gathered} x+(x+57.6)=90\degree \\ x+x+57.6\degree=90\degree \\ 2x=90\degree-57.6\degree \\ 2x=32.4\degree \\ \frac{2x}{2}=\frac{32.4\degree}{2} \\ x=16.2\degree \end{gathered}[/tex]With that we have the following
[tex]\begin{gathered} x=16.2\degree\text{ (first angle)} \\ \\ x+57.6\degree \\ =16.2\degree+57.6\degree \\ =73.8\degree\text{ (second angle)} \end{gathered}[/tex]