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


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