Table of contents
- 0. Review of College Algebra4h 45m
- 1. Measuring Angles40m
- 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
Radians
Problem 35
Textbook Question
In Exercises 35–40, convert each angle in radians to degrees. Round to two decimal places. 2 radians
Verified step by step guidance1
Recall the conversion formula from radians to degrees: \(\text{degrees} = \text{radians} \times \frac{180}{\pi}\).
Substitute the given angle in radians into the formula: \(2 \times \frac{180}{\pi}\).
Multiply the numerator: \(2 \times 180 = 360\), so the expression becomes \(\frac{360}{\pi}\).
Divide 360 by the value of \(\pi\) (approximately 3.14159) to get the angle in degrees.
Round the resulting value to two decimal places to complete the conversion.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Radian Measure
A radian is a unit of angular measure based on the radius of a circle. One radian is the angle created when the arc length equals the radius. It is a standard unit in trigonometry and is related to degrees through the circle's total angle of 2π radians.
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Degree Measure
Degrees are a common unit for measuring angles, where a full circle is divided into 360 equal parts. Degrees are often used in practical applications and are related to radians by the conversion factor 180° = π radians.
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Conversion Between Radians and Degrees
To convert radians to degrees, multiply the radian value by 180/π. This formula allows you to express an angle measured in radians as degrees, which is often easier to interpret. For example, 2 radians × (180/π) gives the angle in degrees.
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Related Videos
Related Practice
Textbook Question
In Exercises 21–28, convert each angle in radians to degrees.7𝜋6
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