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
1. Measuring Angles
Angles in Standard Position
2:13 minutes
Problem 4b
Textbook Question
Textbook QuestionFind a positive angle less than 2𝜋 that is coterminal with 16𝜋 3
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Coterminal Angles
Coterminal angles are angles that share the same terminal side when drawn in standard position. To find a coterminal angle, you can add or subtract multiples of 2π (360 degrees) from the given angle. For example, if you have an angle of 16π/3, you can subtract 2π until the angle falls within the desired range.
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Coterminal Angles
Radian Measure
Radian measure is a way of measuring angles based on the radius of a circle. One complete revolution around a circle corresponds to 2π radians. Understanding how to convert between degrees and radians is essential for solving problems involving angles, especially when determining coterminal angles.
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Converting between Degrees & Radians
Finding Positive Angles
When tasked with finding a positive angle less than 2π, it is important to ensure that the resulting angle is within the range of 0 to 2π. This often involves subtracting 2π from the original angle until the result is positive and falls within the specified range, ensuring that the angle is both coterminal and meets the criteria.
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Drawing Angles in Standard Position
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