Geometry and Trigonometry


What is a periodic function?

Periodic functions are those that repeat the same values at regular intervals. For trigonometric functions, the period (or the interval of repeated values) is 360 degrees or 2π for the sin, cosine, secant, and cosecant; and 180 degrees or π radians for the cotangent and tangent. (For example, this is often said as “the tangent function has period π.”)


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