Period and Frequency of Sine and Cosine - AlgebraLAB
http://algebralab.org/lessons/lesson.aspx?file=Trigonometry_TrigPeriodFreq.xml
Introduction: In this lesson, the period and frequency of basic graphs of sine and cosine will be discussed and illustrated. The Lesson: y = sin(x) and y = cos(x) are periodic functions because all possible y values repeat in the same sequence over a given set of x values. The “length” of this interval of x values is called the period.
DA: 8 PA: 10 MOZ Rank: 36