Page 48 - Ebook Trigonometri_Krisna Hasugian_MESP 2019
P. 48

Now lets take a look at y = 2 cos x





















               We can conclude that the amplitude vertically stretches or shrinks both the sine
               and cosine graphs.  Notice that when the amplitude was changed the function still

               repeats every 2π units, therefore the amplitude does not affect the period of the
               function.


               PERIOD


               Again lets look at the graph of y = sin x


















               Notice how the graph changes when we change the function to y = sin 2x


















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