Convert each radian measure to degrees. See Examples 2(a) and 2(b). 7π/4
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Recall the conversion formula between radians and degrees: \(\text{Degrees} = \text{Radians} \times \frac{180}{\pi}\).
Substitute the given radian measure \(\frac{7\pi}{4}\) into the formula: \(\text{Degrees} = \frac{7\pi}{4} \times \frac{180}{\pi}\).
Simplify the expression by canceling out \(\pi\) in the numerator and denominator: \(\text{Degrees} = \frac{7}{4} \times 180\).
Multiply the fraction by 180: \(\text{Degrees} = \frac{7 \times 180}{4}\).
Simplify the fraction to find the degree measure.
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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.
Degrees are a common unit for measuring angles, where a full circle is divided into 360 equal parts. Each degree represents 1/360 of a full rotation, making it intuitive for everyday use and angle measurement.
To convert radians to degrees, multiply the radian value by 180/π. This ratio comes from the equivalence of 2π radians to 360 degrees. For example, 7π/4 radians equals (7π/4) × (180/π) = 315 degrees.