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Trigonometric Functions and the Unit Circle
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Concept Version 4
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Radians

One radian

One radian

The angle $t$ sweeps out a measure of one radian. Note that the length of the intercepted arc is the same as the length of the radius of the circle. 

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    Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:

    "Algebra and Trigonometry, Algebra and Trigonometry.."
    http://cnx.org/contents/13ac107a-f15f-49d2-97e8-60ab2e3b519c@5.241 OpenStax CC BY 4.0.

Related Terms

  • radian
  • arc
  • circumference
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