Question

Help me in my trigonometry

Answer 1

C

Explanation:

Using the tangent ratio in the right triangle

tan54° =
`(opposite)/(adjacent)` =
`(BC)/(AC)` =
`(BC)/(39)` ( multiply both sides by 39 )

39 × tan54° = BC, then

BC ≈ 53.68 ( to 2 dec. places ) → C

Answer 2

BC=53.68

Explanation:

Use tangent since you are finding the opposite side and given the adjacent side.

tan(54)=BC/39

BC=53.68