In triangle ABC△ABC, a=12, b=8, c=8a=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: