Question

What is the value of d

Answer 1

d ≈ 6.48

Explanation:

Using the tangent ratio in the right triangle

tan42° =
`(opposite)/(adjacent)` =
`(EF)/(DE)` =
`(d)/(7.2)`

Multiply both sides by 7.2

7.2 × tan42° = d, hence

d ≈ 6.48 ( to the nearest hundredth )