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Cosine Function HTML5 applet

This is an html5 applet to explore the properties of the graphs of cosine functions. The parameters

$a$ ,

$b$ ,

$c$ and

$d$ included in the definition of a cosine function of the form

$f(x)= a \: cos{(b x+c)}+d$

may be changed and therefore the graph of function

$f$ explored. A radio button may be used to graph cos(x) in order to compare and therefore better understand the properties of

$a \: cos{(b x+c)}+d$ .

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