Determine the value of x using a trigonometric
ratio.

Answer:
B. 8.56
Explanation:
Given:
So using cosine rule:
[tex]\sf cos(x) = \dfrac{adjacent}{hypotenuse}[/tex]
[tex]\rightarrow \sf cos(50) = \dfrac{5.5}{x}[/tex]
[tex]\rightarrow \sf x= \dfrac{5.5}{cos(50) }[/tex]
[tex]\rightarrow \sf x= 8.56[/tex]