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b. Change in coefficient b on the function graph y = sin bx
Pay attention to the function graph y1 = without x, y4 = sin
3x below.
← y1 = sin x
← y4 = sin 3x
It was found that:
1. The value b of the function y = sin bx has a great effect
on the large period of the function. The graph of the
2
function y = sin bx has a period .
2. The graph function y = sin bx can be obtained by close
up or stretching the graph function y = sin x so that the
2
chart has a period .
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