Give the amplitude or period as requested.
-Period of $y = - 2 \cos \frac { 1 } { 3 } x$
A) $- 2$
B) $\frac { 2 \pi } { 3 }$
C) $6 \pi$
D) $\frac { \pi } { 3 }$

Question

Quizplus · Accepted Answer

The period of a cosine function is given by $ \frac{2\pi}{|b|} $, where $b$ is the coefficient of $x$ inside the cosine function. Here, $b = \frac{1}{3}$, so the period is $ \frac{2\pi}{\frac{1}{3}} = 6\pi $.

Give the Amplitude or Period as Requested y=−2cos⁡13xy = - 2 \cos \frac { 1 } { 3 } xy=−2cos31​x

Give the Amplitude or Period as Requested $y = - 2 \cos \frac { 1 } { 3 } x$