A²=b²+c²-2bc Cos (a) In this case , we can find the length of side a using the above cosine law. If you are given the values of side b , c and angle a, then it is easy to calculate the length of side a. To find side b, b²=a²+c²-2ac Cos(b) To find side c, c²=b²+c²-2bc Cos (c) Just the given values in the formula and get the length of the missing side. You can also find the missing angle using these formulas.
Also, to everyone who is mad at the first person who answered this, they probably don't have edge and the person who asked the question didn't give a picture. They did their best
