Question

From the top of a building, 40 feet above the ground, a construction worker locates a rock at a 12° angle of depression. How far is the rock from the building? ​

Answer 1

I think that the other answer is WRONG

tan(12) =
`(x)/(40)`

x = tan(12)*40 = 8.5

Explanation:

`(sin\left(78\right))/(40)=(sin\left(12\right))/(x)` = 8.5

Answer 2

188 m

Explanation:

`\tan(12) = (40)/(x) \\ x = (40)/( \tan(12) ) \\ x = 188`