According to the representation, the triangle is a rectangle, in that case, we can assign the names of hick and hypotenuse. The hypotenuse is 29 and the opposite hick to the angle x is 9, given that information, the function which relates all of them is the sine function like this:
[tex]sin(x)=\frac{opposite\text{ }hick}{hypotenuse}=\frac{9}{29}[/tex]
The objective is to find the value of, like this
[tex]sin^{^{-1}}(\frac{9}{29})=x\Rightarrow18.08001262[/tex]
Rounding the value of x, x=18.1
