Table of contents
- 0. Review of College Algebra4h 43m
- 1. Measuring Angles39m
- 2. Trigonometric Functions on Right Triangles2h 5m
- 3. Unit Circle1h 19m
- 4. Graphing Trigonometric Functions1h 19m
- 5. Inverse Trigonometric Functions and Basic Trigonometric Equations1h 41m
- 6. Trigonometric Identities and More Equations2h 34m
- 7. Non-Right Triangles1h 38m
- 8. Vectors2h 25m
- 9. Polar Equations2h 5m
- 10. Parametric Equations1h 6m
- 11. Graphing Complex Numbers1h 7m
2. Trigonometric Functions on Right Triangles
Solving Right Triangles
3:38 minutes
Problem 57b
Textbook Question
Textbook QuestionSolve each problem.See Examples 3 and 4. Angle of Elevation of the Sun The length of the shadow of a building 34.09 m tall is 37.62 m. Find the angle of elevation of the sun to the nearest hundredth of a degree.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Angle of Elevation
The angle of elevation is the angle formed by the horizontal line from an observer's eye to an object above that line. In this context, it refers to the angle between the ground and the line of sight to the top of the building. Understanding this concept is crucial for applying trigonometric functions to solve problems involving heights and distances.
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Trigonometric Ratios
Trigonometric ratios, such as sine, cosine, and tangent, relate the angles of a triangle to the lengths of its sides. For the problem at hand, the tangent function is particularly relevant, as it relates the angle of elevation to the opposite side (the height of the building) and the adjacent side (the length of the shadow). Mastery of these ratios is essential for solving problems involving right triangles.
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Right Triangle Properties
A right triangle has one angle measuring 90 degrees, and the relationships between its sides and angles are governed by trigonometric principles. In this scenario, the building and its shadow form a right triangle, where the height of the building is the opposite side, and the shadow length is the adjacent side. Recognizing and applying the properties of right triangles is fundamental for calculating the angle of elevation.
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