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A cosine function has a period of 3, a maximum value of 20, and a minimum value of 0. The function is a reflection of its parent function over the x-axis.

Which function could be the function described?

 

A.f(x)=−10cos(3x)+10

B.f(x)=−10cos(2π3x)+10

C.f(x)=10cos(3x)−10

D.f(x)=10cos(2π3x)+10

...?

 May 30, 2018
edited by Guest  May 30, 2018
 #1
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-10 cos ( 2 pi x / 3) + 10      I believe it is your second choice, though there is a typo.

 May 30, 2018
 #2
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−10cos(2π/3*x)+10

Guest May 30, 2018

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