Question

Solve for x. (round to the nearest thousandth). Show all work.

Answer 1

x ≈ 2.472

Explanation:

using the cosine ratio in the right triangle

cos72° =
`(adjacent)/(hypotenuse)` =
`(x)/(8)` ( multiply both sides by 8 )

8 × cos72° = x , then

x ≈ 2.472 ( to the nearest thousandth )