Answer: [tex]34.9\°[/tex]
Step-by-step explanation:
If both birds are placed as shown in the attached figure, we have a right triangle with the value of its two sides known. Hence, we can use the trigomometric function tangent:
[tex]tan x=\frac{opposite-side}{adjacent-side}[/tex]
[tex]tan x=\frac{30 ft}{43 ft}[/tex]
[tex]x=tan^{-1}(\frac{30 ft}{43 ft})[/tex]
[tex]x=34.9\°[/tex] This is the angle of depression
