law of sines

law of sines, Principle of trigonometry stating that the lengths of the sides of any triangle are proportional to the sines of the opposite angles. That is, law of sines (a/sinA=b/sinB=c/sinC)when a, b, and c are the sides and A, B, and C are the opposite angles.

This article was most recently revised and updated by William L. Hosch.
Citation Information
Article Title: law of sines
Website Name: Encyclopaedia Britannica
Publisher: Encyclopaedia Britannica, Inc.
Date Published: 02 February 2011
URL: https://www.britannica.comhttps://www.britannica.com/science/law-of-sines
Access Date: November 21, 2024