Graphing Variations of \({f( x) =\cos x}\) Using Transformations

Use the graph of \(f( x) =\cos x\) to graph \(g( x) =\cos ( 3x)\).

Solution The graph of \(g( x) =\cos ( 3x)\) is a horizontal compression of the graph of \(f( x) =\cos x\). Figure 73 shows the transformation.

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