Question

Given that x = 9.2 m and θ = 15°, work out AC rounded to 3 SF​

Answer 1

AC ≈ 9.52 m

Explanation:

Using the cosine ratio in the right triangle

cos15° =
`(BC)/(AC)` =
`(9.2)/(AC)` ( multiply both sides by AC )

AC × cos15° = 9.2 ( divide both sides by cos15° )

AC =
`(9.2)/(cos15)` ≈ 9.52 m ( to 3 sf )