Question

B = 54°, c = 15, a =_?___ (Round answers to
the nearest hundredth.)

Answer 1

a ≈ 8.82

Explanation:

using the cosine ratio in the right triangle

cos54° =
`(adjacent)/(hypotenuse)` =
`(BC)/(AB)` =
`(a)/(15)` ( multiply both sides by 15 )

15 × cos54° = a , then

a ≈8.82 ( to the nearest hundredth )