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Trigonometric Laws

Trigonometry (from Greek trigōnon "triangle" + metron "measure") is a branch of mathematics that deals with triangles, particularly those plane triangles in which one angle has 90 degrees (right triangles). Trigonometry deals with relationships between the sides and the angles of triangles and with the trigonometric functions, which describe those relationships.

Trigonometry has applications in both pure mathematics and in applied mathematics, where it is essential in many branches of science and technology. It is usually taught in secondary schools either as a separate course or as part of a precalculus course. Trigonometry is informally called "trig". - Wikipedia

Law of Cosines
RF Cafe: Trigonometry Laws
Law of Tangents
RF Cafe: Trigonometry Laws
Law of Sines
RF Cafe: Trigonometry Laws
Right Triangle (reference)
RF Cafe: Trigonometry Laws

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