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
7. Non-Right Triangles
Law of Sines
Problem 7.27
Textbook Question
Textbook QuestionSolve each triangle ABC that exists.
A = 96.80°, b = 3.589 ft, a = 5.818 ft
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Law of Sines
The Law of Sines is a fundamental principle in trigonometry that relates the ratios of the lengths of sides of a triangle to the sines of its angles. It states that for any triangle ABC, the ratio of a side length to the sine of its opposite angle is constant: a/sin(A) = b/sin(B) = c/sin(C). This law is particularly useful for solving triangles when given two angles and one side or two sides and a non-included angle.
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Triangle Properties
Understanding the properties of triangles is essential for solving them. A triangle's angles always sum to 180 degrees, which allows for the calculation of unknown angles when some are known. Additionally, the relationship between the sides and angles, such as the longest side being opposite the largest angle, is crucial for applying trigonometric laws effectively.
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Angle Measurement
In trigonometry, angles can be measured in degrees or radians, and it's important to be consistent with the unit used throughout calculations. The given angle A = 96.80° indicates that the triangle is an obtuse triangle, which affects the possible configurations of the other angles and sides. Understanding how to convert between degrees and radians can also be beneficial when applying trigonometric functions.
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