To state the law of sines.
A triangle ABC with sides a, b, and c.
It is the relationship between sides and angles of non-right triangles.
Law of sines state that the ratio of length of the side of the non-right-angled triangle of the sine of the opposite angle of that side.
This is same for all angles and sides in an oblique triangle.
In a triangle ABC, the sides are a, b, and c, then