Answer:
Step-by-step explanation:
In the image attached, you can observe that the angle we need to find is an acute angle of a right triangle, where its hypothenuse is 21 units long and its opposite leg is 16 units long.
Having these elements, we can use the sine trigonometric reason to find the angle.
[tex]sin(x)=\frac{opposite \ leg}{hypothenuse} =\frac{16}{21}\\ x=sin^{-1}(\frac{16}{21} ) \approx 49.63\°[/tex]
Therefore, the angle is 49.63°, approximately.
