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Ch. 3 - Radian Measure and The Unit Circle
Lial - Trigonometry 12th Edition
Lial12th EditionTrigonometryISBN: 9780136552161Not the one you use?Change textbook
Chapter 4, Problem 33

Convert each radian measure to degrees. See Examples 2(a) and 2(b). 11π/6

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1
Recall the conversion formula between radians and degrees: \(\text{Degrees} = \text{Radians} \times \frac{180}{\pi}\).
Identify the given radian measure: \(\frac{11\pi}{6}\).
Substitute the radian value into the conversion formula: \(\frac{11\pi}{6} \times \frac{180}{\pi}\).
Simplify the expression by canceling \(\pi\) in numerator and denominator: \(\frac{11}{6} \times 180\).
Multiply the fraction by 180 to find the degree measure: \(11 \times \frac{180}{6}\).

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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, where 2π radians equal 360 degrees.
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Degree Measure

Degrees are a common unit for measuring angles, where a full circle is divided into 360 equal parts. Each degree can be further divided into minutes and seconds, but for most trigonometry problems, degrees are used as a straightforward measure of angle size.
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Conversion Between Radians and Degrees

To convert radians to degrees, multiply the radian measure by 180/π. This ratio comes from the equivalence of 2π radians to 360 degrees. For example, 11π/6 radians equals (11π/6) × (180/π) = 330 degrees.
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