45. Velocity An airplane is flying in the direction 25° west of north at 800 km/h. Find the component form of the velocity of the air- plane, assuming that the positive x-axis represents due east and the positive y-axis represents due north.

Algebra & Trigonometry with Analytic Geometry
13th Edition
ISBN:9781133382119
Author:Swokowski
Publisher:Swokowski
Chapter6: The Trigonometric Functions
Section6.7: Applied Problems
Problem 64E
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45°
F
45. Velocity An airplane is flying in the direction 25° west of north
at 800 km/h. Find the component form of the velocity of the air-
plane, assuming that the positive x-axis represents due east and
the positive y-axis represents due north.
46. Velocity An airplane is flying in the direction 10° east of south
at 600 km/h. Find the component form of the velocity of the air-
plane, assuming that the positive x-axis represents due east and
the positive y-axis represents due north.
47. Location A bird flies from its nest 5 km in the direction 60°
north of east, where it stops to rest on a tree. It then flies 10 km in
the direction due southeast and lands atop a telephone pole. Place
an xy-coordinate system so that the origin is the bird's nest, the
x-axis points east, and the y-axis points north.
a. At what point is the tree located?
b. At what point is the telephone pole?
48. Use similar triangles to find the coordinates of the point Q that di-
vides the segment from P1(x1, ı, z1) to P2(x2, 2, z2) into two
lengths whose ratio is p/q = r.
49. Medians of a triangle Suppose that A, B, and C are the corner
points of the thin triangular plate of constant density shown here.
a. Find the vector from C to the midpoint M of side AB.
b. Find the vector from C to the point that lies two-thirds of the
way from C to M on the median CM.
Transcribed Image Text:45° F 45. Velocity An airplane is flying in the direction 25° west of north at 800 km/h. Find the component form of the velocity of the air- plane, assuming that the positive x-axis represents due east and the positive y-axis represents due north. 46. Velocity An airplane is flying in the direction 10° east of south at 600 km/h. Find the component form of the velocity of the air- plane, assuming that the positive x-axis represents due east and the positive y-axis represents due north. 47. Location A bird flies from its nest 5 km in the direction 60° north of east, where it stops to rest on a tree. It then flies 10 km in the direction due southeast and lands atop a telephone pole. Place an xy-coordinate system so that the origin is the bird's nest, the x-axis points east, and the y-axis points north. a. At what point is the tree located? b. At what point is the telephone pole? 48. Use similar triangles to find the coordinates of the point Q that di- vides the segment from P1(x1, ı, z1) to P2(x2, 2, z2) into two lengths whose ratio is p/q = r. 49. Medians of a triangle Suppose that A, B, and C are the corner points of the thin triangular plate of constant density shown here. a. Find the vector from C to the midpoint M of side AB. b. Find the vector from C to the point that lies two-thirds of the way from C to M on the median CM.
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