Law of Sines

Theorem
For any triangle $\triangle ABC$:


 * $\dfrac a {\sin A} = \dfrac b {\sin B} = \dfrac c {\sin C}$

where $a$, $b$, and $c$ are the sides opposite $A$, $B$ and $C$ respectively.

Also known as
This result is also known as the sine law, sine rule or rule of sines.

Also see

 * Law of Cosines