# A triangle has sides A, B, and C. Sides A and B are of lengths #7# and #8#, respectively, and the angle between A and B is #pi/6#. What is the length of side C?

##### 1 Answer

Dec 30, 2015

The length of side C is equal to **9.78**

#### Explanation:

To solve for side c, you can use the cosine law. Draw a figure then if the figure is properly labeled you'll be able to use cosine law using:

where **a,b** and **c** are the sides of the triangle and **C** is the angle between A and B.

Substitute the data given and you'll get the result of **9.78**