Page 45 - Ebook Trigonometri_Krisna Hasugian_MESP 2019
P. 45

Graph of the cosine function  (   =          )

















                   •  If you notice, the range of the cosine function is [-1, 1] and the domain is
                       (-∞, ∞)

                   •  This is an even function because it is symmetric with respect to the y axis
                       therefore for all cos( -x ) = cos (x)

                     The period is also 2π because the cosine wave repeats every 2π units




















































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