Determine the amplitude or period as requested.
Graph Variations of y = cos x
-Amplitude of $y = \frac { 1 } { 3 } \cos 4 x$
A) $\frac { 1 } { 3 }$
B) 4
C) $\frac { \pi } { 4 }$
D) $6 \pi$

Question

Quizplus · Accepted Answer

The amplitude of a trigonometric function like $y = \frac{1}{3}\cos 4x$ is given by the absolute value of the coefficient in front of the cosine function, which in this case is $\frac{1}{3}$.

Determine the Amplitude or Period as Requested y=13cos⁡4xy = \frac { 1 } { 3 } \cos 4 xy=31​cos4x

Determine the Amplitude or Period as Requested $y = \frac { 1 } { 3 } \cos 4 x$