Asked by Lydia

From the top of a lighthouse 75 feet high, the cosine of the angle of depression of a boat out
at sea is 4. To the nearest foot, how far is the boat from the base of the lighthouse?
Answered by Henry
The cosine can't be greater than 1.
Answered by Henry
cosA = 0.4,
A = 66.4 deg.

tan66.4 = 75 / d,
d = 75 / tan66.4 = 33 Ft.
There are no AI answers yet. The ability to request AI answers is coming soon!