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

Question

Quizplus · Accepted Answer

The period of the basic cosine function $y = \cos x$ is $2\pi$. When the function is in the form $y = \cos(bx)$, the period is given by $\frac{2\pi}{|b|}$. For $y = 4\cos x$, $b = 1$, so the period remains $2\pi$.

Determine the Amplitude or Period as Requested y=4cos⁡xy = 4 \cos xy=4cosx

Determine the Amplitude or Period as Requested $y = 4 \cos x$