Answer:
[tex]m\angle A=53.13^o[/tex]
Step-by-step explanation:
we know that
In the right triangle of the figure
The cosine of angle A is equal to divide the adjacent side to angle A by the hypotenuse
so
[tex]cos(A)=\frac{6}{10}[/tex] ----> by CAH
Find the measure of the angle A
[tex]m\angle A=cos^{-1}(\frac{6}{10})[/tex]
[tex]m\angle A=53.13^o[/tex]
