just a few questions: what is the cosine rule? and the sine rule? any formulas? thanks!
Given a triangle with sides a, b, and c, and angles opposite those sides A, B, and C respectively:
This is the Law of Sines:
These are the Law of Cosines:
(The Law of Cosines may be thought of as a generalization of the Pythagorean Theorem to triangles not necessarily including a right angle.)
-Dan