Question

How do u do this does anyone know xd

Answer 1

AB ≈ 7.1 cm

Explanation:

Using the cosine ratio in the right triangle

cos28° =
`(adjacent)/(hypotenuse)` =
`(AB)/(AC)` =
`(AB)/(8)` ( multiply both sides by 8 )

8 × cos28° = AB , thus

AB ≈ 7.1 cm ( to the nearest tenth )

Answer 2

Explanation:

cos 28=
`(AB)/(8)`

AB= cos28 * 8

=7.06

hope this helps