# A triangle has sides A, B, and C. Sides A and B are of lengths #2# and #4#, respectively, and the angle between A and B is #(7pi)/8 #. What is the length of side C?

##### 1 Answer

Dec 19, 2016

c=5.8737

#### Explanation:

The figure explaining the given data is given below:

To find side 'c', Cosine rule would apply in this case. Cosine rule says that

Cos C=

c=5.8737