# How do you find the value of #cos(pi/4)#?

##### 2 Answers

You would look on the unit circle.

#### Explanation:

!unit circle

#### Explanation:

It is possible to find the exact value of

First, let's convert radians into degrees

Now let's draw a right triangle with one of the acute angles set to *supplementary*, meaning that their sum would be

By setting the length of one of the sides adjacent to the right angle to

Thus