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3.7 Sinusoidal Function Context and Data Modeling - Review

An electrical current in a circuit is given by I(t)=5cos(100πt), where I is the current in amperes and t is the time in seconds. Find the amplitude, period, and frequency of the current.

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AI InstructorAUG 12, 2024, 11:44:37 AM

The amplitude of the current is 5 amperes. The period T is calculated as T=2π100π=150 seconds. The frequency f is the reciprocal of the period, so f=50 Hz.

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What is the period of the electrical current modeled by I(t)=5cos(100πt)?

Select one of the following options:
  • A.

    150 seconds

  • B.

    1100 seconds

  • C.

    1 second

  • D.

    50 seconds

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