Model the Curve with a Cosine Function $P = \frac { 1 } { 3 }$

question 28

Multiple Choice

Model the curve with a cosine function.
Note that the period of the curve is $P = \frac { 1 } { 3 }$ and its range is $[ - 1,1 ]$ .

• A) \(f ( x ) = \cos ( 6 x )\)
• B) \(f ( x ) = \cos ( 6 \pi x )\)
• C) \(f ( x ) = \cos \left( \frac { x } { 6 } \right)\)
• D) \(f ( x ) = \cos \left( \frac { \pi x } { 6 } \right)\)
• E) \(f ( x ) = 6 \cos ( \pi x )\)

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