Solve the Problem $E$ Is Modeled By $\mathrm { E } = 2.7 \cos 30 \pi \mathrm { t }$

question 28

Multiple Choice

Solve the problem.
-For an electrical circuit, the voltage $E$ is modeled by $\mathrm { E } = 2.7 \cos 30 \pi \mathrm { t }$ , where $t$ is the time in seconds. How many cycles are completed in one second?

• A) \(30 \pi\) cycles
• B) \(2.7\) cycles
• C) 30 cycles
• D) 15 cycles

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