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
3:35 minutes
Problem 34
Textbook Question
Textbook QuestionSolve each right triangle. In each case, C = 90°. If angle information is given in degrees and minutes, give answers in the same way. If angle information is given in decimal degrees, do likewise in answers. When two sides are given, give angles in degrees and minutes. See Examples 1 and 2. a = 958 m, b = 489 m
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Right Triangle Properties
A right triangle is defined by one angle measuring 90 degrees. The other two angles are acute and their sum is always 90 degrees. The sides of a right triangle are categorized as the opposite, adjacent, and hypotenuse, with the hypotenuse being the longest side opposite the right angle. Understanding these properties is essential for applying trigonometric ratios.
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Trigonometric Ratios
Trigonometric ratios relate the angles of a triangle to the lengths of its sides. The primary ratios are sine (sin), cosine (cos), and tangent (tan), defined as sin(θ) = opposite/hypotenuse, cos(θ) = adjacent/hypotenuse, and tan(θ) = opposite/adjacent. These ratios are crucial for finding unknown angles and sides in right triangles.
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Angle Measurement
Angles can be measured in degrees or radians, with degrees often expressed in degrees and minutes for precision. In this context, angles are given in degrees and minutes, which requires converting decimal degrees to this format when necessary. Understanding how to convert and express angles correctly is vital for accurate calculations in trigonometry.
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