# How do you find the amplitude, period, vertical and phase shift and graph #y=cos(theta-45)#?

##### 1 Answer

Jul 5, 2017

First, you should rewrite the equation so it uses radians instead of degrees.

45° =

The standard form of a cosine function is

In this equation,

The period of a cosine (and sine) function is

Thus, the amplitude is 1, the period is

graph{cos (x-pi/4) [-10, 10, -5, 5]}