Determine the amplitude or period as requested.
-Period of $y = - 3 \cos \frac { 1 } { 2 } x$
A) $4 \pi$
B) $- 3$
C) $\frac { 3 \pi } { 2 }$
D) $\frac { \pi } { 2 }$

Question

Quizplus · Accepted Answer

The period of a cosine function of the form $y = a \cos(bx)$ is given by $\frac{2\pi}{|b|}$. Here, $b = \frac{1}{2}$, so the period is $\frac{2\pi}{\frac{1}{2}} = 4\pi$.

Determine the Amplitude or Period as Requested y=−3cos⁡12xy = - 3 \cos \frac { 1 } { 2 } xy=−3cos21​x

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