Calculus

A cosine function is a reflection of its parent function over the x-axis. The amplitude of the function is 9, the vertical shift is 11 units down, and the period of the function is 12π/7. The graph of the function does not show a phase shift.

What is the equation of the cosine function described?

f(x)=___cos( ___x)

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  1. for the function described by:
    The amplitude of the function is 9, the vertical shift is 11 units down, and the period of the function is 12π/7
    y = 9cos(7x/6) - 11

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