Question

Solve for x. Round to the nearest tenth. Help

Answer 1

x ≈ 20

Explanation:

Using the cosine ratio in the right triangle

cos26° =
`(adjacent)/(hypotenuse)` =
`(18)/(x)` ( multiply both sides by x )

x × cos26° = 18 ( divide both sides by cos26° )

x =
`(18)/(cos26)` ≈ 20.0 ( to the nearest tenth )

Answer 2

26

Explanation:

cosθ = adjacent / hypotenuse

cos(26) = 18 / x

x= 18 / cos(26)

x= 27.82418 ≈ 20 (to nearest tenth)