### Home > PC > Chapter 6 > Lesson 6.2.3 > Problem6-97

6-97.

Find the period of each function.

Use the formula:
$pb = 2π$

$p =$ period
$b =$ frequency

1. y = 5 sin 3x

$3$ is the frequency.

1. $y = \cos πx$

$π$ is the frequency.

1. $y = \sin \frac { \pi x } { 5 }$

$\frac{\pi}{5}$ is the frequency.

1. $y = \cos \frac { \pi x } { 5 }+ 3$

$\frac{\pi}{5}$ is the frequency.