# amplitude and frequency

• May 26th 2011, 01:43 AM
Duke
amplitude and frequency
A particle
P moves with position x(t) = 4 cos(2t 2). Give the amplitude and

frequency of this motion.
• May 26th 2011, 03:33 AM
jgv115
If we have $y = a \cos (n\theta -b)$

Then $a$ is the amplitude and $\frac{2\pi}{n}$ is the period/frequency of the cos graph

Use this information to solve the question