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uysha [10]
3 years ago
7

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

Mathematics
2 answers:
trapecia [35]3 years ago
7 0

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

topjm [15]3 years ago
6 0

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

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