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How far from shore is a ship when a coastguard sights it at an angle of depression of 6 degrees on a 30 feet vertical cliff?
Wiki User
∙ 13y ago
Use trigonometry and the tangent ratio:
tan = opp/adj and when rearranged adj (the ship's distance) = opp/tan
adj = 30/tan(6) = 285.4309336
Therefore the ship is just over 285 feet from shore.
Remember that the angle of depression is the same as the angle of elevation because they are alternate angles.
Wiki User
∙ 13y ago
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