APFIVE Frequency of a Sinusoidal Function
The water level, h, in feet, in a harbor is modeled by the function h(t) = 12 + 4cos(πt/6), where t is the number of hours after midnight. What is the frequency of this sinusoidal function?
A
6/π cycles per hour
B
1/12 cycles per hour
C
12 cycles per hour
D
π/6 cycles per hour
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