Answer:
[tex]75.96^o[/tex]
Step-by-step explanation:
see the attached figure to better understand the problem
we know that
In the right triangle ABC
[tex]tan(A)=\frac{BC}{AC}[/tex] ----> by TOA (opposite side divided by the adjacent side)
substitute the given values
[tex]tan(A)=\frac{80}{20}[/tex]
using a calculator
[tex]m\angle A=tan^{-1}(\frac{80}{20})=75.96^o[/tex]
