Question

Use the diagram and cosine function to find the value of x.

Answer 1

D

--

x=9.4cos(58°)

because the cosine function uses the ratio of the adjacent side to that of the hypotenuse.

9.4 is the hypotenus the ration is 58 degrees I believe

Answer 2

$\\ \rm\Rrightarrow cosA=\dfrac{Base}{Hypotenuse}$

$\\ \rm\Rrightarrow cos58=\dfrac{x}{9.4}$

$\\ \rm\Rrightarrow x=9.4cos58$

Option D