# Law of Sines

The law of sines is an equation that relates the three sides of a triangle with the three angles of a triangle using the sine function.

## Law of Sines Derivation

Derive Law of Sines | Example

To derive the equation for the law of sines, observe the shared perpendicular line by two angles. The third angle can be included by repeating the process.

Derive Law of Sines (Inscribed Triangle) | Example

The law of sines can be derived using a triangle inscribed on the perimeter of a circle. The proof uses the inscribed angle theorem.