Chapter 8: Q. 63 (page 531)
Make up three problems involving oblique triangles. One should result in one triangle, the second in two triangles, and the third in no triangle.
Short Answer
Problem 1.
Problem 2:
Problem 3:
Chapter 8: Q. 63 (page 531)
Make up three problems involving oblique triangles. One should result in one triangle, the second in two triangles, and the third in no triangle.
Problem 1.
Problem 2:
Problem 3:
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Get started for freeThe hypotenuse of a right triangle is 5 inches. If one leg is 2 inches, find the degree measure of each angle.
an object attached to a coiled spring is pulled down a distance a from its rest position and then released. Assuming that the motion is simple harmonic with period T, write an equation that relates the displacement d of the object from its rest position after t seconds. Also assume that the positive direction of the motion is up:
Rework Problem 8 under the same conditions except that, at time t = 0, the object is at its resting position and moving down.
Mollweide’s Formula For any triangle, Mollweide’s Formula (named after Karl Mollweide, 1774–1825) states that
Derive it.
[Hint: Use the Law of Sines and then a Sum-to-Product Formula. Notice that this formula involves all six parts of a triangle. As a result, it is sometimes used to check the solution of a triangle.]
A state trooper is hidden 30 feet from a highway. One second after a truck passes, the angle between the highway and the line of observation from the patrol car to the truck is measured. See the illustration.
(a) If the angle measures 15°, how fast is the truck traveling? Express the answer in feet per second and in miles per hour.
(b) If the angle measures 20°, how fast is the truck traveling? Express the answer in feet per second and in miles per hour.
(c) If the speed limit is 55 miles per hour and a speeding ticket is issued for speeds of 5 miles per hour or more over the limit, for what angles should the trooper issue a ticket?
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