# How do you find the period and amplitude of #y=2/3cos((pix)/10)#?

##### 1 Answer

Mar 29, 2017

amplitude is 2/3

period is 20

#### Explanation:

for

here, y=

so period is

also, amplitude is

graph{(2/3)cos((pix)/10)[-10, 10, -5, 5]}