# In #triangle ABC#, #a=12, b=8, c=8#, how do you find the cosine of each of the angles?

##### 1 Answer

Mar 28, 2017

Use the law of cosines as below

#### Explanation:

The law of cosines states that

This law can be rearranged to solve for the cosine of an angle instead of a side.

For each angle, plug in the adjacent sides for

In your case: