A triangle has sides A, B, and C. The angle between sides A and B is #(2pi)/3# and the angle between sides B and C is #pi/12#. If side B has a length of 12, what is the area of the triangle?
First, we find the missing angle
for the next side we get 9.170785943 ide A
http://www.teacherschoice.com.au/Maths_Library/Trigonometry/solve_trig_AAS.htm for more details
the area is 37.5034
here is a good online calculator for this
and also how I got to this area.