The Function Graphed Is of the Form Y $$y = a \sin b x \text { or } y = a \cos b x , \text { where } b > 0$$

Multiple Choice

The function graphed is of the form y $$y = a \sin b x \text { or } y = a \cos b x , \text { where } b > 0$$ Determine the equation of the graph.
-For an electrical circuit, the voltage $\mathrm { E }$ is modeled by $\mathrm { E } = 2.7 \cos 28 \pi \mathrm { t }$ , where $\mathrm { t }$ is the time in seconds. How many cycles are completed in one second?

A) 14 cycles
B) $2.7$ cycles
C) 28 cycles
D) $28 \pi$ cycles