Question

AB

Round your answer to the nearest hundredth.
С
4
A
25°
?
B

Answer 1

AB ≈ 4.41

Explanation:

Using the cosine ratio in the right triangle

cos25° =
`(adjacent)/(hypotenuse)` =
`(AC)/(AB)` =
`(4)/(AB)` ( multiply both sides by AB )

AB × cos25° = 4 ( divide both sides by cos25° )

AB =
`(4)/(cos25)` ≈ 4.41 ( to the nearest hundredth )