A cosine function has a period of 4, a maximum value of 20, and a minimum value of 0. The function is a not a reflection of its parent function over the x-axis. Which function could be the function described?
-f(x)=−10cos(2x)+10
-f(x)=10cos(2x)−10
-f(x)=−10cos(π/2x)+10
-f(x)=10cos(π/2x)+10

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