# How do you find the amplitude, period, and shift for #y= 4cos(x/2+pi/2)#?

##### 1 Answer

Nov 21, 2015

The amplitude is 4, the period is

#### Explanation:

There is a general equation for cosine

where

c is the horizontal displacement

and d is the vertical displacement

So for your equation of

a = 4

b = 1

d = 0

This makes your amplitude, 4

period,

horizontal displacement

and no vertical displacement