Which graph represents the function y is equal to cosine of 4 x ?

Name: Revolt
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Image with description On a coordinate plane, a function has a maximum at 1 and minimum at negative 1. It completes one period at StartFraction pi Over 2 EndFraction. It crosses the y-axis at (0, 1).

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Which graph represents the function y is equal to cosine of 4 x ?

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