Find an Equation for the Graph $y = \frac { 1 } { 2 } \cos \left( \frac { 1 } { 2 } x \right)$

question 124

Multiple Choice

Find an equation for the graph.
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• A) \(y = \frac { 1 } { 2 } \cos \left( \frac { 1 } { 2 } x \right)\)
• B) \(y = \frac { 1 } { 2 } \cos \left( \frac { 1 } { 4 } x \right)\)
• C) \(y = \cos ( 4 x )\)
• D) \(y = \frac { 1 } { 2 } \cos ( 4 x )\)

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