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Chapter 8: Q. 1 (page 527)
The difference formula for the sine function is.
The solution is.
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Find the distance from A to C across the pond illustrated in the figure.
A person in a small boat, offshore from a vertical cliff known to be feet in height, takes a sighting of the top of the cliff. If the angle of elevation is found to be, how far offshore is the boat?
Finding the Lean of the Leaning Tower of Pisa The famous Leaning Tower of Pisa was originally 184.5 feet high.* At a distance of 123 feet from the base of the tower, the angle
of elevation to the top of the tower is found to be 60°. Find RPQ indicated in the figure. Also, find the perpendicular distance from R to PQ.
Designing an Awning An awning that covers a sliding glass door that is 88 inches tall forms an angle of 50° with the wall. The purpose of the awning is to prevent sunlight from entering the house when the angle of elevation of the Sun is more than 65°. See the figure. Find the length L of the awning.
Rework Problem 5 under the same conditions except that, at time t = 0, the object is at its resting position and moving down.
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