Question

Solve for x. Round to the nearest tenth, if necessary.​

Answer 1

Answer:

Step-by-step explanation:

take 60 degree as reference angle

using cos rule

cos 60=adjacent/hypotenuse

1/2=80/x(do cross multiplication)

80*2=x

160=x

Answer 2

Answer:

x = 160

Step-by-step explanation:

Using the cosine ratio in the right triangle

cos60° = $\frac{adjacent}{hypotenuse}$ = $\frac{CD}{CE}$ = $\frac{80}{x}$ ( multiply both sides by x )

x × cos60° = 80 ( divide both sides by cos60° )

x = $\frac{80}{cos60}$ = 160