Hi, We know:
Sin(a + b) = 2.Sin(a).Sin(b)
Then,
= 2Sin(a).Cos(b)/Cos(a).Cos(b)
Canceling Cos(b)
= 2Sin(a)/Cos(a)
As Tan(a) = Sin(a)/Cos(a)
Then we will stay:
= 2Tan(a)
Or
= Tan(a) + Tan(a)
There is anything wrong on the alternatives
Each exterior angle = 6.923076923076923
So, 6.923076923076923 * 52 = 360
$31.50 is the correct answer
Do u have to use all of them? If not they could be 182 or 343
The lowest sum would be 2 and the highest is 10
So the sums from 2 through 10 equal 9