# What is the amplitude, period and the phase shift of #y=cos2x#?

##### 1 Answer

Mar 29, 2018

Amplitude is 1

Period is halved and is now

No phase shift has happened

#### Explanation:

A~Vertical stretch (Amplitude)

B~Horizontal stretch (period)

C~Horizontal translation (phase shift)

D~Vertical translation

So the A is 1 which means the amplitude is 1

So the B is 2 which means the period is halved so it is

So the C is 0 which means it hasn't been phase shifted

So the D is 0 which means it hasn't been upwards