# How do you graph #y=1/3 cosx#?

##### 1 Answer

Nov 6, 2015

You are modifing a function by scalar multiplication, i.e. you're going from

This kind of changing only affects the amplitude of the function. In fact, if

You can see that all the rest remains untouched, if

Moreover, also the derivatives are in the same relation, since

Of course, all I wrote applies when