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- https://math.libretexts.org/Courses/Fresno_City_College/Math_4A%3A_Trigonometry_(Stitz_Zeager_Remix)/01%3A_Angles_and_Trigonometric_Functions/1.03%3A_Trigonometric_IdentitiesOur first set of identities is the `Even / Odd' identities.The properties of the circular functions when thought of as functions of angles in radian measure hold equally well if we view these function...Our first set of identities is the `Even / Odd' identities.The properties of the circular functions when thought of as functions of angles in radian measure hold equally well if we view these functions as functions of real numbers. Not surprisingly, the Even / Odd properties of the circular functions are so named because they identify cosine and secant as even functions, while the remaining four circular functions are odd.
- https://math.libretexts.org/Courses/Cosumnes_River_College/Math_370%3A_Precalculus/10%3A_Foundations_of_Trigonometry/10.04%3A_Trigonometric_IdentitiesOur first set of identities is the `Even / Odd' identities.The properties of the circular functions when thought of as functions of angles in radian measure hold equally well if we view these function...Our first set of identities is the `Even / Odd' identities.The properties of the circular functions when thought of as functions of angles in radian measure hold equally well if we view these functions as functions of real numbers. Not surprisingly, the Even / Odd properties of the circular functions are so named because they identify cosine and secant as even functions, while the remaining four circular functions are odd.
- https://math.libretexts.org/Courses/Lorain_County_Community_College/Book%3A_Precalculus_(Stitz-Zeager)_-_Jen_Test_Copy/10%3A_Foundations_of_Trigonometry/10.04%3A_Trigonometric_IdentitiesOur first set of identities is the `Even / Odd' identities.The properties of the circular functions when thought of as functions of angles in radian measure hold equally well if we view these function...Our first set of identities is the `Even / Odd' identities.The properties of the circular functions when thought of as functions of angles in radian measure hold equally well if we view these functions as functions of real numbers. Not surprisingly, the Even / Odd properties of the circular functions are so named because they identify cosine and secant as even functions, while the remaining four circular functions are odd.
- https://math.libretexts.org/Courses/Lorain_County_Community_College/Book%3A_Precalculus_Jeffy_Edits_3.75/10%3A_Foundations_of_Trigonometry/10.04%3A_Trigonometric_IdentitiesOur first set of identities is the `Even / Odd' identities.The properties of the circular functions when thought of as functions of angles in radian measure hold equally well if we view these function...Our first set of identities is the `Even / Odd' identities.The properties of the circular functions when thought of as functions of angles in radian measure hold equally well if we view these functions as functions of real numbers. Not surprisingly, the Even / Odd properties of the circular functions are so named because they identify cosine and secant as even functions, while the remaining four circular functions are odd.
- https://math.libretexts.org/Bookshelves/Precalculus/Precalculus_(Stitz-Zeager)/10%3A_Foundations_of_Trigonometry/10.04%3A_Trigonometric_IdentitiesOur first set of identities is the `Even / Odd' identities.The properties of the circular functions when thought of as functions of angles in radian measure hold equally well if we view these function...Our first set of identities is the `Even / Odd' identities.The properties of the circular functions when thought of as functions of angles in radian measure hold equally well if we view these functions as functions of real numbers. Not surprisingly, the Even / Odd properties of the circular functions are so named because they identify cosine and secant as even functions, while the remaining four circular functions are odd.
- https://math.libretexts.org/Courses/Chabot_College/MTH_36%3A_Trigonometry_(Gonzalez)/01%3A_Foundations_of_Trigonometry/1.04%3A_Trigonometric_IdentitiesOur first set of identities is the `Even / Odd' identities.The properties of the circular functions when thought of as functions of angles in radian measure hold equally well if we view these function...Our first set of identities is the `Even / Odd' identities.The properties of the circular functions when thought of as functions of angles in radian measure hold equally well if we view these functions as functions of real numbers. Not surprisingly, the Even / Odd properties of the circular functions are so named because they identify cosine and secant as even functions, while the remaining four circular functions are odd.
