# How do you draw #45^circ# and #-45^circ# in standard position and then show that #cos(-45^circ)=cos45^circ#?

##### 1 Answer

Aug 7, 2018

I tried this:

#### Explanation:

Have a look:

where the green segment represents the cossine.

The negative angle means that you move clockwise in describing your angles (starting from the positive half of the horizontal axis).