# How do you determine the period for #y = cos (2pix)#?

##### 2 Answers

Apr 27, 2015

Calling this number

So in your case you have

Your function does an entire oscillation in 1 radian.

graph{cos(2pix) [-2.433, 2.435, -1.215, 1.217]}

Apr 27, 2015

Another way to think about it:

You can think of this as meaning that the values

make up one period.

So the question is what values of

would cause

The answer is obviously

So the period is