Flashcard 9 - 11th Grade Mathematics: Functions Flashcard Set for the SBAC

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The correct answer is:

\(120^\circ\) or \(\frac{2\pi}{3}\)


Explanation:

The general form of the cosine function is \(f(x)=Acos(Bx-C)+D\),

where the period is \(\frac{2\pi}{B}\). That makes the period of the given function

\(\frac{2\pi}{3}\), or, in degrees, \(120^\circ\).

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