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Sagot :
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:
x = 160
Step-by-step explanation:
Using the cosine ratio in the right triangle
cos60° = [tex]\frac{adjacent}{hypotenuse}[/tex] = [tex]\frac{CD}{CE}[/tex] = [tex]\frac{80}{x}[/tex] ( multiply both sides by x )
x × cos60° = 80 ( divide both sides by cos60° )
x = [tex]\frac{80}{cos60}[/tex] = 160
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