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Trigonometric Symmetry Identities

Symmetry around the $y$-axis

Symmetry around the $y$-axis

Cosine and secant are even functions, with symmetry around the $y$-axis.

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

Related Terms

  • odd function
  • even function
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