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Chapter 8: Q. 10 (page 549)
Rework Problem 6 under the same conditions except that, at time t = 0, the object is at its resting position and moving down.
The equation of the motion can be given as
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Calculating Distances at Sea The navigator of a ship at sea spots two lighthouses that she knows to be 3 miles apart along a straight seashore. She determines that the angles formed between two line-of-sight observations of the lighthouses and the line from the ship directly to shore are 15° and 35°. See the illustration.
(a) How far is the ship from lighthouse P?
(b) How far is the ship from lighthouse Q?
(c) How far is the ship from shore?
At 10 AM on April 26, 2009, a building 300 feet high casts a shadow 50 feet long. What was the angle of elevation of the Sun?
Solve each triangle.
Area of an ASA Triangle If two angles and the included side are given, the third angle is easy to find. The area K of the triangle with side and angles A, B, and C is
Area of a triangle Prove the two other forms of the above formula.
and
Find the area of the triangle. Round answer to two decimal places.
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