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Chapter 8: Q. 8 (page 534)
A special case of the Law of Cosines is the Pythagorean theorem.
The solution is true.
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Area of an ASA Triangle If two angles and the included side are given, the third angle is easy to find. Use the Law of Sines to show that the area K of the triangle with side and angles A, B, and C is
Rework Problem 5 under the same conditions except that, at time t = 0, the object is at its resting position and moving down.
Find the distance from A to C across the pond illustrated in the figure.
Finding Distances A forest ranger is walking on a path inclined at 5° to the horizontal directly toward a 100-foottall fire observation tower. The angle of elevation from the
path to the top of the tower is 40°. How far is the ranger from the tower at this time?
The displacement d (in meters) of an object at time t (in seconds) is given
(a) Describe the motion of the object.
(b) What is the maximum displacement from its resting position?
(c) What is the time required for one oscillation?
(d) What is the frequency?
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