what determines sine law
The law of sines is one of two trigonometric equations commonly applied to find lengths and angles in scalene triangles, with the other being the law of cosines.
When the last of these equations is not used, sometimes the law is stated using the reciprocals : The law of sines can be used to compute the remaining sides of a triangle when two angles and a side are knownâa technique known as triangulation. However, calculating this may result in numerical error if an angle is close to 90 degrees.