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Sneakers - Athletic Shoes | Foot Locker Funnyjunk Trackitdown - Dance Music MP3/WAV/Merchandise Distribution Centre The Hottest Dubstep Songs on the Planet - uDubstep dot com Law of Cosines: Formula and examples of the law of cosines and a free worksheet Law of Cosines Formula Video Tutorial of Law on Law of Cosines Interactive Demonstration of the Law of Cosines Formula The interactive demonstration below illustrates the Law of cosines formula in action. The two common problems types that are suitable for the law of cosines are. Problem type 1: when you know the lengths of 2 sides of a triangle and the angle in between the two sides Problem type 2: when you know the lengths of three sides of a triangle and want to know a particular angle Example of Law of Cosines Formula x² = 10² + 14² −2(10)(14)cos(44°)x² = 296 −280cos(44)x² = 94.6 Practice applying Law of Cosines Law of Cosines to Find a Side Length Practice Problem 1) Use the law of cosines formula to calculate the length of side A. Practice Problem 2) Use the law of cosines formula to calculate the length of side A. A² = 52² + 16² −2(52)(16)cos(115°) A² = 2,704 + 256 − 1,664cos(115) A² = 2,960− 1,664(-.423) A² = 2,960 +703 = 3663 Law of Cosines to Find an Angle Practice Problem 3)