Question

Given that x = 9.5 m and θ = 20°, work out AC rounded to 3 SF​

Answer 1

Answer:

AC ≈ 10.1 m

Step-by-step explanation:

Using the cosine ratio in the right triangle

cos20° = $\frac{adjacent}{hypotenuse}$ = $\frac{BC}{AC}$ = $\frac{9.5}{AC}$ ( multiply both sides by 9.5 )

AC × cos20° = 9.5 ( divide both sides by cos20° )

AC = $\frac{9.5}{cos20}$ ≈ 10.1 m ( to 3 sf )