Without graphing the function, determine its amplitude or period as requested.
-$y = \cos 3 x \quad$ Find the period.
A) 1
B) 3
C) $\frac { 2 \pi } { 3 }$
D) $2 \pi$

Name: Without graphing the function, determine its amplitude or period as requested. -$y = \cos 3 x \quad$ Find the period. A) 1 B) 3 C) $\frac { 2 \pi } { 3 }$ D) $2 \pi$
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Question

Quizplus · Accepted Answer

The period of a cosine function of the form $y = \cos(bx)$ is given by $\frac{2\pi}{|b|}$. Here, $b = 3$, so the period is $\frac{2\pi}{3}$.

Without Graphing the Function, Determine Its Amplitude or Period as Requested