A triangle has sides A, B, and C. The angle between sides A and B is #pi/4# and the angle between sides B and C is #pi/12#. If side B has a length of 4, what is the area of the triangle?
First you can figure out the last angle of the triangle which is
then you can use the law of sines to figure out another side.
then do that again to find the last side
then you can use Heron's formula.
First find S