# What is the amplitude, period and phase shift for #y = 4cos(pix)#?

##### 1 Answer

Feb 24, 2018

**Amplitude**

This is described by the a parameter, or the number directly to the left of the sine or cos, in this case

**Period**

The period is given by

Thus the period is

#(2pi)/pi = 2#

**Phase Shift**

There is no phase shift because

Hopefully this helps!