Respuesta :

Using cosine function:

[tex]\begin{gathered} \cos (\theta)=\frac{adjacent}{hypotenuse} \\ so\colon \\ \cos (x)=\frac{16}{20} \\ x=\cos ^{-1}(\frac{16}{20}) \\ x\approx36.9 \end{gathered}[/tex]

Ver imagen AuryJ97353