Question

Determine the value of x using a trigonometric ratio.

Answer 1

Answer:

 B. 8.56

Explanation:

Given:

• angle = 50°

• adjacent = 5.5

• hypotenuse = x

So using cosine rule:

$\sf cos(x) = \dfrac{adjacent}{hypotenuse}$

$\rightarrow \sf cos(50) = \dfrac{5.5}{x}$

$\rightarrow \sf x= \dfrac{5.5}{cos(50) }$

$\rightarrow \sf x= 8.56$