Question

Find the value of e.

Answer 1

Use Law of Sines
\[\frac{e}{\sin 55} = \frac{12}{\sin 40}\]

Answer 2

12/sin 40 = e/sin 55
12/0.64 = e/0.82
e = 15.375

Answer 3

yw :D

Answer 4

@Mr._Cracka_Bone
A nice rule of thumb:
In a triangle, when you know one angle and the length of the opposite side, sine rule will help you find the remaining sides/angles. However, when the unknown angle(s) could be obtuse, there may be two solutions.