Created by StemPy LabA boat sails straight towards a cliff m high. The angle of depression of the boat is and seconds later it is . Find the speed of the boat in metres per second.
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← A mast 26 m long stands on a tower. From a point on level ground the angles of elevation of the bottom and the top of the mast are 30° and 45°. Find the height of the top of the mast above the ground.A ship sails at a constant speed straight towards the foot of a cliff. The angle of depression of the ship is 30°, and 20 minutes later it is 45°. How many more minutes does the ship need to reach the foot? →
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