September 17, 2009
No CommentsAn Introduction to the Law of Cosines
Description
A detailed tutorial on the Law of Cosines and proving the Law of Cosines. Step by step tutorial including several examples of proving the Law of Cosines for reference.
Overview
The Law of Cosines is a formula that is used to relate the sides of a triangle to the cosine of one of its angles. The Law of Cosines can be expressed as:
Where a, b, and c are the sides of the triangle. If the triangle is a right triangle then this simplifies to the Pythagorean Theorem.
