Finding a Reference Angle In Exercises47–54, find the reference angle θ′. Sketch θ instandard position and label θ′.47. θ = 160° 48. θ = 309°49. θ = −125° 50. θ = −215°51. θ = 2π3 52. θ = 7π653. θ = 4.8 54. θ = 12.9

Finding a Reference Angle In Exercises47–54, find the reference angle θ′. Sketch θ instandard position and label θ′.47. θ = 160° 48. θ = 309°49. θ = −125° 50. θ = −215°51. θ = 2π3 52. θ = 7π653. θ = 4.8 54. θ = 12.9

Trigonometry (MindTap Course List)

10th Edition

ISBN:9781337278461

Author:Ron Larson

Publisher:Ron Larson

Chapter1: Trigonometry

Section1.1: Radian And Degree Measure

Problem 30E

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Question

Finding a Reference Angle In Exercises
47–54, find the reference angle θ′. Sketch θ in
standard position and label θ′.
47. θ = 160° 48. θ = 309°
49. θ = −125° 50. θ = −215°
51. θ = 2π
3 52. θ = 7π
6
53. θ = 4.8 54. θ = 12.9

Figure in plane geometry formed by two rays or lines that share a common endpoint, called the vertex. The angle is measured in degrees using a protractor. The different types of angles are acute, obtuse, right, straight, and reflex.

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