SOLUTION: Hi from a lighthouse 70m above sea level a ship 1.2km out to sea is observed. What is the angle of depression from the lighthouse to the ship. thanks

Question 1091576: Hi
from a lighthouse 70m above sea level a ship 1.2km out to sea is observed. What is the angle of
depression from the lighthouse to the ship.
thanks
Found 2 solutions by rothauserc, MathTherapy:
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
1.2km = 1200m
:
tan theta = 1200 /70 = 17.1429
:
tan^-1 17.1429 = 86.6615 degrees
:
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angle of depression = 90 - 86.6615 = 3.3385 degrees
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:

Answer by MathTherapy(10553) (Show Source): You can put this solution on YOUR website!

Hi
from a lighthouse 70m above sea level a ship 1.2km out to sea is observed. What is the angle of
depression from the lighthouse to the ship.
thanks

1.2km = 1,200 m
Angle of DEPRESSION from lighthouse = angle of ELEVATION from ship
We then get:
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