Period
The period of a function
is the minimum positive value such that
. A common example of a periodic function is
, which has period
. Note that
, so we know that the function repeats every
. A diagram can be found at http://www.montereyinstitute.org/courses/DevelopmentalMath/COURSE_TEXT2_RESOURCE/U19_L2_T3_text_final_3_files/image013.gif